Choose the topic sentence that fits this paragraph. First, we will certainly look better. If you exercise, you keep yourself looking slim. Second, we think we will be tired because of exercise, but in fact, exercise gives people extra energy. You can walk up a steep hill or climb stairs. Also, there are improvements for your heart. A strong heart means you will live longer. Finally, exercise reduces stress. This means you will sleep better and be able to concentrate better on your tasks. Overall, there are many good reasons for exercising.

Select one:

a. Exercise is important for all people in the world especially older people who tend to get fat.

b. Exercise is an excellent choice for the human body and mind.

c. Exercise brings benefits for appearance, energy, heart health and stress.