What is one benefit to choosing to walk as an aerobic activity?
a. walking is a weight-bearing exercise.
b. walking burns three times as many calories as running for overweight individuals.
c. there is no risk of injury when walking.
d. there are no poor environmental conditions to walking.

The correct answer is A; Walking is a weight-bearing exercise.

Explanation:

One aerobic activity is walking. Since walking is a weight bearing exercise it helps a person to force their body to work against gravity. Other aerobic exercises that help the body use weight bearing is hiking, jogging, and dancing among others.

Walking can help a person gain more strength in their muscles, and reduce their risk of dangerous falls by gaining more balance. Yoga has become a popular weight bearing exercise and helps with flexibility in people of all ages.

this is really easy just look up what these words mean