A. the money grows like an investment account. b. people only have to spend half of the money that they save. c. people are able to keep the money that they save after medical bills are paid. d. the money is in a tax-free account. select the best answer from the choices provided. a

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

Is this used on a test? ?