Answer: option (C). hippocampus.
Explanation: hippocampus is an important part of the limbic system, a cortical region that regulates motivation, emotion, learning, and memory and it is a brain structure embedded deep in the temporal lobe of each cerebral cortex.
The hippocampus is part of the limbic system, and it plays a pertinent roles in the consolidation of information from short-term memory to long-term memory, and in spatial memory that enables navigation, however, a person can experience a loss of memory and a loss of the ability to make new, long-term memories if the hippocampus is damaged.