Answer:
Well 13 is a prime number so is that even possible?
The correct answer is D. Push-ups.
<em>Push-ups is the only activity which strengthens muscles and can be completed in school.</em>
Exercise helps muscles to be at rest and also makes someone feel reinvigorated. There are some exercise which are strength-building.
For example, jumping sacks, forward lunges, push-ups, arm extension and plank.
The answer is c
Hope this helps
The answer to this is Plan a steady progression of exercise intensity.
