Your body is a wonderful mechanism in which many activities are going on all the time. As you walk and (1)… you play, your muscles are working. As the various organs of your body carry on (2)… special processes, they are (3)… too. (4)… your body maintains a more or less constant temperature. Both work and heat are forms of energy, and the food you eat supplies the body with this (5)… Food contains substances which give this energy by being (6)… - or, in chemical terms, oxidized--in the body cells. In (7)… to providing energy, food contributes materials that regulate body processes and in so doing, keeps the (8)… condition of your body in a proper and therefore healthy balance.
Select one:
a. Therefore
b. Although
c. But
d. Also