The correct answer is A. Endemic.
An endemic species is a species that is native to a particular place and is not found anywhere else in the world. Endemic species are often found in isolated areas, such as islands or mountain ranges. They can be very rare, and some are even threatened or endangered.
There are many reasons why a species might become endemic. One reason is that the area where it lives may be geographically isolated from other areas. This can happen if the area is an island or if it is surrounded by mountains or other barriers. Another reason is that the area where the species lives may have unique environmental conditions that other species cannot tolerate.
Endemic species are important because they are a part of the natural heritage of the area where they live. They can also be important for the economy of the area, as they can attract tourists and scientists. However, endemic species are also vulnerable to extinction, as they are often found in small populations. It is important to protect endemic species and their habitats so that they can continue to thrive.
The other options are incorrect because:
- B. Endangered species are species that are at risk of extinction.
- C. Vulnerable species are species that are at risk of becoming endangered.
- D. Threatened species are species that are at risk of becoming endangered or extinct.