Explanation:
I guess Muscle strength and endurance then there is Cardiovascular Endurance that can help. Flexibility not so much. Body composition helps very much.
Answer:
My final answer would be Body Composition. Nothing else matters that much. In order to swim you need to use to use your body.
Answer:
The Fifteenth Amendment, G.
No explanation necessary, however if you are confused, let me know and I can explain why.