Although the causes of SAD remain unknown, one possibility is that _________may alter the body's underlying biological rhythms.
A) seasonal changes in vegetation
B) seasonal changes in light
C) seasonal changes in environmental temperature
D) season changes due to celebration of holidays

Question

Quizplus · Accepted Answer

Seasonal changes in light, specifically the decreased exposure to natural daylight during the winter months, is a leading theory for the cause of SAD.

Although the Causes of SAD Remain Unknown, One Possibility Is