Final answer:
The amygdala is the part of the brain that is involved in the classical conditioning of fear. It plays a key role in memory formation and attaches emotional value to learning processes and memory.
Step-by-step explanation:
The part of the brain that is involved in the classical conditioning of fear is the amygdala. The amygdala is a part of the limbic system, which regulates emotions and behaviors related to fear and motivation. It plays a crucial role in memory formation and is specifically responsible for attaching emotional value to learning processes and memory. Studies have shown that damage to the amygdala can impair fear conditioning and memory.