Stress can cause the body to tense up as a defense mechanism. Which body system would this affect?
O A. Digestive system
B. Endocrine system
O C. Nervous system
D. Musculoskeletal system

If babies are consistently placed on their backs without any restrictions, what will happen to their development? a. they suffer from weakness in certain muscle groups. b. their ability to roll over, crawl, and eventually walk is hindered. c. they suffer brain damage from the pressure on the back of the head. d. they learn to roll over, crawl, and eventually walk on their own.

Whic disease reduces bone density and causes the bones to become brittle

What is one way that cold and flu viruses spread? a. by transfusing contaminated blood b. by inhaling contaminated droplets c. by eating contaminated meat d. by drinking contaminated water