Ben was enjoying a walk in the woods on a beautiful saturday afternoon. as he went around a curve, he noticed a bear walking toward him. immediately his pupils dilated, he began to perspire, and his heart accelerated. these changes are most closely related to the function of the:
a angulargyrus
b hippocampus
c parasympathetic nervous system
d sympathetic nervous system
e ventricularsystem

The answer is D. sympathetic nervous system.

Explanation:

Among other functions, this system is responsible for releasing noradrenaline in the presence of a stimulus, which in prolonged periods lead to the release of adrenaline. In combination, these chemicals provoke a "flight or fly" response.

Some of the effects on the body are pupil dilatation, and increased heart rate, blood pressure and sweating.

i think it is the third one.