The _____ is a small forebrain structure that monitors pleasurable activities (e.g.eating, drinking, and sex) , emotion, stress, and reward.

A) hypothalamus
B) basal ganglia
C) corpus callosum
D) medulla

The hypothalamus is a small forebrain structure that is responsible for monitoring and regulating many important bodily functions, including hunger, thirst, body temperature, and sleep. Additionally, it is also responsible for monitoring pleasurable activities such as eating, drinking, and sex, as well as emotions, stress, and reward. The other options (B) basal ganglia, (C) corpus callosum, and (D) medulla, are not directly involved in monitoring pleasurable activities or emotions.