B. The air you breathe.
Because the rest of the choices are not environmental factors. Gang activity, and access to jobs and education are not environmental because environment are things about the world.
I think it's the manufacturer <span />
Answer:
True
Explanation:
Mountain climbers works your upper and lower body as well as your core, adding cardio and total body strength exercise to your workout.
The answer is the upper back muscles. Hope I helped!
