Which brain region plays an essential role in the formation of declarative memories?

A) cerebrum
B) cerebellum
C) hippocampus
D) thalamus
E) hypothalamus

The hippocampus plays an essential role in the formation of declarative memories, which are memories that can be consciously recalled, such as facts or events. It is not the cerebellum or thalamus, which are more involved in movement and sensory processing, respectively. The hypothalamus plays a role in regulating physiological processes, but is not primarily involved in memory formation. The cerebrum is a large area of the brain that encompasses many different regions, so it is not a specific enough answer.