Final answer:
The correct answer to the question is 'amygdala,' as it has dense connections with various sensory areas and is essential for classical conditioning and attaching emotional value to memories.
Step-by-step explanation:
The amygdala is a significant part of the brain with dense connections to various sensory areas; it is crucial for classical conditioning and attaching emotional value to memory. The part of the amygdala referred to in the question is known as the basolateral complex. This complex is vital for assessing the emotional significance of stimuli and for the effective learning process. The amygdala's role extends to its involvement in the formation of fear memories, as well as the consolidation of memories, particularly those with an emotional component. Thus, among the choices provided - basolateral, amygdala, cerebellum - the correct answer to fill in the blank is 'amygdala'.