a. A threatened species and an endangered species are the same thing. b. A threatened species means that the population is likely to become endangered. An endangered species has population numbers so low that it is likely to become extinct. c. A threatened species is already extinct. An endangered species means that the population's numbers have increased greatly over the last 5 years. d. A threatened species means that the population is likely to become endangered. An endangered species is already extinct.

I've been able to find many species that have been over-hunted or have been killed off due to the introduction of a competitive species. I know many species of animals in the rain forests have gone extinct due to deforestation, but I have not been able to find any specific ones.

What is the nature of the relationship between each species? What is the nature of the relationship between the species and the environment? What is the nature of the relationship within the species between its individual entities? What is the nature of the relationship of the species individual entities with themselves? What is the nature of the relationship between the entities who placed the species on the island and the species? A comprehensive answerer might choose to skip over particular parts of the question if they appear irrelevant, and perhaps choose to give a reason why it is irrelevant. Answers need not be limited in size or by concrete literalism; conjecture is welcome. Feel free to e-mail me if you are interested in extra details. To survive is to live, and that means at the very least that the species biological needs must be accommodated. An island can be considered as an isolated region. Most commonly associated with a surrounding body of water. To limit to a region is to make an ecosystem more controllable. Therefore, the answer to this question might not be a generalized answer for the entire material body(not necessarily a planet) on which the island is located. Finite resources means that at any instant in time the resources are finite. This circumstance is true in almost all scenarios, but I felt it might be useful to state it explicitly as the finite resources are often taken for granted to be infinite. Therefore, in my opinion, the species which is best equipped to survive is the species which can find shelter with limited space and nourishment with limited time in an environment ranging from highly controlled to highly volatile. How could a species be classified as having the desirable nature for accomplish these criteria? For finding shelter in limited space the species should have the capacity to live comfortably in space which is either unreachable by other species or undesirable to other species. Otherwise, the species would have to compete with other species for living space. For finding nourishment the species should either live close to where the nourishment grows or habituates, so as to obtain its meal before another species eats it, or have an extremely wide diet for nourishment, a meal which is so widely prevalent that it will always be present even if all of the other species were scavenging. Essentially, the most durable species is the species which does not need to compete because of the convenient availability of resources; in the case of non-human species primarily because the species is naturally genetically evolved to live in non- competitive harmony with nature. Regarding shelter, high above or down below would be most preferable on an overpopulated island. Simply because there is more space in the air or in the ground than on a single plane of footing. Therefore, insects, burrowing species, and birds would be ideal(the island could have a dome for preventing birds from flying off the island). Regarding nourishment, parasites would probably be the best off on an overpopulated island as their food supply would coincide with the scenario. Carnivores would be runners up, but they would have to compete with other carnivores considering that eventually all of the non-carnivore species might eventually become extinct(as non-human species do not consider live-stock economy). "What is the nature of the relationship of the species individual entities with themself?" This question is mostly a source of conjecture, but essentially it is asking what relationships do some species exhibit beyond the need for biological sustenance. Some species might at the very least appear to have a personality trait which is notably not solely present for biological needs. "What is the nature of the relationship between the entities who placed the species on the island and the species?" Another question which is likely to be answered with some amount of conjecture. What kind of bond, positive or negative, might the species naturally react with when confronted by the entity which placed them on the island? Considering that the entity possibly had confronted the species on many occasions for many experiments on islands.