Which one of the following statements about physical activity and weight loss and maintenance is most accurate?
a. regular physical activity control the percentage of body fat in children and adolescents.
b. muscle-strengthening activities promote weight maintenance better than aerobic activities.
c. the optimal amount of physical activity needed to achieve and maintain a healthy weight is the same for most people.
d. people who want to lose a substantial amount of weight need

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.