Final answer:
The amygdala is the structure of the brain that produces instinctual emotions and plays a primary role in fear. It is part of the limbic system and is connected to other structures such as the hypothalamus, thalamus, and hippocampus.
Step-by-step explanation:
The amygdala is the structure of the brain that produces instinctual emotions, also known as 'thinking with your heart'. It plays a primary role in fear and is involved in processing emotional information and sending that information on. The amygdala is part of the limbic system, which is the area of the brain involved in emotion and memory. It is connected to other structures such as the hypothalamus, thalamus, and hippocampus.