Please help! This is due soon<3:(

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

Select the correct answer from each drop-down menu. in an experiment, dr. travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. the amount of calcium is variable. the risk of bone fractures .

Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?