Respuesta :
Answer:
B. Walking has a low risk of injury.
Explanation:
The main idea of the excerpt is to promote walking as a form of exercise that could be easy adopted by anyone and that can be a nice way to start doing some exercise that can be benefical for the health of many people, and it doesn´t have the impact that other sports or exercises have on the human body, this can encourage people that are prone to injuries to start walking.