Doing exercise can change the body and the way it functions.
a. true
b. false

True. But this will affect the body in many beneficial ways. Exercise is known to induce a faster rate in the body's metabolism causing the person to lose weight or feel vibrant. Aside from this, many experts suggest that exercising is always a smart move and a highly recommended activity as individuals age. Together with a strict diet, exercise prevents chronic diseases (e.g. heart conditions, asthma) to happen. It actually improves the quality of life in individuals and should be done at least 30 minutes every day for 3 alternating days within the week. 

Imma gonna say go with the very first answer (:

Around the ages of 7-12