A species which is facing the danger of being extinct in near future due to mass hunting or any other environmental or anthropogenic effect is termed as threatened species. One of the best examples of threatened species is Giant Panda.
Rest of the options are wrong because extinct means the species which have already been wiped off from the earth. Dinosaurs is also not correct answer because dinosaur is extinct species. Also, extant means the species which is present on the earth and it is not vulnerable to endangerment.
An adaptation is a trait that "evolved" for a particular condition that allows the animal to survive. Something is adaptive if it is a useful trait but not necessarily one that occurred in response to a particular selection pressure. Basically a trait is an adaptation if it is the product of selection, and adaptive if it is beneficial in the present time.
An environmental change is occurring due to continents shifting and moving to different parts of the earth’s surface is a long term change due to tectonic plates movements. if this happends for the continously then there will be different sesonal changes .
