The answer would be Microfilaments.
Answer:
A typical example of the stress response is a grazing zebra. If the zebra sees a lion closing in for the kill, the stress response is activated as a means to escape its predator. The escape requires intense muscular effort, supported by all of the body's systems.
Explanation:
Because in order to do anything that's fun, like hanging out with friends,
learning math, going to the beach, reading a book, playing with a dog,
going for a bike ride, going to school, and like a whole bunch of other
things like those, you like have to be living, or else like none of it works.
The answer is either all of the above or the third option