Getting a cramp while swimming is the worst that could happen to us people. I think the best answer here is to relax, float and massage the cramped muscle because, if you try to keep swimming the muscle could tighten more and could get out of hand and could cause you to drown.
I believe the answer to your question is C.
List of necessities for our body:
- Water.
- Food.
- Oxygen.
- The nervous system
Promote rain infiltration, provide diverse habitat for native wildlife, reduce<span> soil erosion, and deliver clean water into streams.</span>