Which of the following activities is facilitated by the sympathetic nervous system?

The sympathetic nervous system is primarily responsible for the body's "fight or flight" responses during stressful situations. When activated, it prepares the body to respond to perceived threats or challenges. One of the key activities it facilitates is increased alertness, which helps an individual respond more effectively to a stressful or dangerous situation. This involves a range of physiological changes, such as increased heart rate, dilated pupils, and heightened mental clarity, all contributing to improved awareness and readiness.

In contrast, activities like feeding, restoration, and sexual arousal are mostly associated with the parasympathetic nervous system, which promotes "rest and digest" functions. The parasympathetic system is involved in processes that support relaxation, energy conservation, and bodily maintenance, making it distinct from the alertness and readiness fostered by the sympathetic nervous system. Thus, increased alertness is the correct choice regarding the activities facilitated by the sympathetic nervous system.