As molly is walking across campus, a car swerves toward her. her heart races and sweat breaks out as she jumps out of harm's way. this mobilization of energy is due to the action of molly's

sympathetic nervous system

Explanation:

Sympathetic nervous system

The sympathetic nervous system (SNS)

are a part of the autonomic nervous system (ANS), that also comprises of parasympathetic nervous system (PNS).

The sympathetic nervous system are responsible and in charge of our fight or flight responses which means they tell us whether to run or stay and fight when a situation arises.

They work through many connected brain cells which warns us of danger .

These are the nervous system that told Molly to flee before she can get hit by the car, so it played the flight function on her under this circumstance.

a would be the answer