Question

which is a long - term effect of sun exposure?
a bright red rash after sitting in the sun
a stinging burn that is sensitive to touch
a change in skin complexion or sallowness
a cluster of freckles appearing on the skin

Explanation:

A bright red rash, stinging burn, and freckles are relatively short - term effects. A change in skin complexion or sallowness is a long - term effect as it is related to cumulative damage from sun exposure over time.

Answer:

a change in skin complexion or sallowness