Final answer:
In women, hormonal changes are most correlated with weight gain. Factors like stress, lack of exercise, and genetic predisposition can also contribute, but hormonal changes tend to have a stronger correlation.
Step-by-step explanation:
In women, the factor that is most correlated with weight gain is often hormonal changes. Hormones, such as estrogen and progesterone, can influence appetite, metabolism, and fat storage in the body. For example, during menopause, a woman's hormonal balance changes, which can lead to weight gain.
While factors like stress, lack of exercise, and genetic predisposition can also contribute to weight gain, hormonal changes tend to have a stronger correlation in women.