Final answer:
The sympathetic nervous system, responsible for 'fight or flight' responses, is most likely to be activated when (correct option is D) Benny sees a snake, as this situation poses an immediate threat which requires a rapid physiological response.
Step-by-step explanation:
The sympathetic nervous system is a part of the autonomic nervous system that is predominantly activated during high-stress or dangerous situations, often referred to as the 'fight or flight' response. Among the given scenarios, the sympathetic nervous system is most likely to be activated when Benny sees a snake.
This response is characterized by physiological changes such as increased heart rate, dilated pupils, and the release of adrenaline into the bloodstream, all of which prepare an organism for a quick and efficient reaction to perceived threats.
Inherent to this system's function is the preparation of the body to face imminent danger, and the sudden encounter with a venomous snake epitomizes such a life-threatening situation. Consequently, seeing a snake would elicit a strong sympathetic nervous response, aiming to facilitate potential defensive actions or escape.