The is a primitive structure that is part of the limbic system. It controls emotional memory, is involved in emotional instinctual behavior, and is associated with implicit memory. During extreme stress or danger, it serves as an alarm to alert our body to react.

The Amygdala

Explanation:

Amygdala, one of the four basal ganglia in the cerebral hemisphere is part of the limbic system which consisting of an almond like -shaped mass of gray matter is located deep in the brain's medial temporal lobe.

The amygdala is involved in the autonomic responses related with fear and hormonal secretions, emotional memory and instinctual behaviour.

For example if we are exposed to a fearful situation, information about that fearful situation is sent to the amygdala immediately, which sends signals to areas of the brain called hypothalamus which then triggers a "fight-or-flight" response in us .

the correct answer is d