Kinesiology. The rest of the options do not even really have a focus that involves human biology.
Answer:
The extinction of a large number of species within a relatively short period of geological time.
The tropic level is each level of hierarchy in an ecosystem and the primary source of energy left over after an animal is consumed from the lowest level up. a food web is a system of inner locking interdependent food chains.
Hope it helped
Explanation:
I'm pretty sure it's the plants.
