Which of the following statements best describes aerobic activities? a. they make your bones stronger. b. they make your heart beat faster. c. they make your limbs flexible. d. they make your muscles larger.

Which statement best explains the relationship between diet and osteoporosis? a. cholesterol blocks calcium from reaching bone cells. a diet that is high in cholesterol can lead to osteoporosis. b. calcium and phosphorus build strong and flexible bones. a diet that lacks these nutrients can lead to osteoporosis. c. protein and iron build strong and flexible bones. a diet that lacks these nutrients can lead to osteoporosis.