Final answer:
The limbic system is primarily involved with emotions and includes the amygdala and hippocampus, which are essential in processing fear and memory, respectively. (Options b)
Step-by-step explanation:
The limbic system of the brain is involved mainly with emotions. This set of interconnected structures plays a critical role in regulating emotion, as well as behaviors related to fear and motivation. The limbic system includes components such as the amygdala, which is key for the sensation of fear and for recognizing fearful faces, and the hippocampus, which contributes to memory formation.
This system also encompasses parts of the thalamus and hypothalamus and is involved in various other brain functions, including memory and the regulation of homeostatic processes like appetite and blood pressure.