I think the answer is B.
With some quick researching.
Hope this helps
Answer: Exercise and physical activity fall into four basic categories—endurance, strength, balance, and flexibility. Most people tend to focus on one activity or type of exercise and think they’re doing enough. Each type is different, though. Doing them all will give you more benefits. Mixing it up also helps to reduce boredom and cut your risk of injury.
Explanation: It is possible to complete!
<span> the answer is the brainstem</span>
