Technically any of these. Are there any other details or specifics. I'd assume participating in sports because a diet only helps stress levels in the long term, watching television can relax a person but the other factors such as lack of social activity can contribute to a person's overall mental state and therefore increase stress levels, and studying can actually be relieving for some people depending on the mental state and needs of them but can obviously be a stresser. The only downfall to participating in sports is getting to excited or emotional during a game for example. But overall, C is the best choice.
Answer:
Agility is the ability to move quickly and easily. It'll help him run faster and it'll help dodge opponents coming at him.
They usually contain a diuretic. A diuretic increases the amount of water lost from the body. Since the body is made up of 80% water, the person will see some weight loss. Once the person stops taking the supplement the weight will be regained quickly.