Answer:
B. anaerobic activities
Explanation:
Heavy weight lifting is an exercise, so it's not a lifestyle or sedentary exercise off the bat. It's anaerobic, and here's why:
Aerobic means "requiring oxygen." This includes long-distance exercise, like running, where you're actually traveling a distance.
Anaerobic means "not requiring oxygen." This includes heavy weight lifting, because you're mostly stationary.
Sedentary means "sitting down." It's like me sitting in front of my computer all day.
Lifestyle is like everything else; fun things that contribute to your lifestyle.