What does regular participation in sports do for your body?
a. control caloric intake
b. control weight
c. decreases energy levels
d. decreases oxygen transport

Regular participation in sports helps control weight. The correct answer to the given question among all the options given is option "b". Whenever a person gets associated with physical sports there is no chance of gaining weight as the excess fat of the body starts burning with the physical labor that is associated with the sports. The fitness and flexibility of a person is bound to increase.The endurance level and the amount of oxygen intake also increases and this results in a completely fit body.

Regularly participating in sports has many cardiovascular benefits. It also improves the physical condition of your body. 

The answer you're seeking for here would be B - helps control weight. 
Being physically active increases your basal metabolism and increases the amount of calories your body burns through a day. For this reason, if you're eating the same as before, you might lose some weight or have an easier time controling it. 

Keeps you from getting lung cancer from smoking