Looking at a picture of people showing emotional expressions causes the greatest activity in the .

Looking at a picture of people showing emotional expressions causes the greatest activity in the amygdala

Explanation:

The amygdala is a part of limbic system of brain which is actually an information filter regulated by our emotional state. It links with the persons's emotional memory and mental state.

Due to strong emotional context involvement , fear and pleasure is linked with the functioning of amygdala.

Amygdala is associated with following functions :

1) Emotional responses.

2) Autonomic responses associated with fear.

3)Processing and consolidating memory

4) Hormonal secretions.

Hence emotional expressions causes the greatest activity in the amygdala.