Which autonomic system is most likely to be dominant while someone is in a stressful situation?
peripheral nervous system
sympathetic nervous system
somatic nervous system
parasympathetic nervous system

The correct option is:

sympathetic nervous system

Stress is actually nothing but the bodies reacting to a challenge that it is faced with.

Explanation:

In response to a stressor, the sympathetic nervous system choreographs what you familiarly call the fight-or-flight answer. It improves muscle blood flow and tension, stretches pupils, stimulates heart rate and respiration, and prolongs perspiration and arterial blood pressure.

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.