According to the u. s. department of health and human services, marriage improves mental health.
a. true
b. false

True.

Explanation:

According to U.S. Department of Health & Human Services, specifically, marriage has a positive effect on mental health.

Marriage may provide a sense of fullness and fulfillness, physically and mentally, because it satisfies the social connection, like intimate relationship, which is a basic need, because we are a social species.

In addition, researches state that this mental health improvement is due to the reliability that each part of the marriage invest, and also, because their economy is slightly improve, due to the fusion of two different incomes. So, all these variable cause an improvement in health when people get married.

However, researches state that this doesn't mean that marriage will always improve mental health, there are cases where all is chaos, but is not the majority.

The answer id letter d 90 

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle