Gina jumps with fear as she feels a hand on her shoulder while walking on a deserted path across campus. Her fear evaporates when she hears her boyfriend's voice saying, "What are you doing out so late, Gina?" What brain structure played a key role when Gina's fear evaporated?

A. medulla
B. hippocampus
C. cerebral cortex
D. amygdala

D

Explanation:

The amygdala is responsible for emotion, especially those that are primitive such as fear and sex drive.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

a. to encourage apoptosis