Why is swimming a strength?

Answer 1

The strengths, physically, are stronger muscles, like the quads, calves, abs, biceps, triceps, hamstrings, latimus dorsi, gastrophnimius, and others. The mental strengths are being able to focus, self confidence, and more friends that can relate to you through swimming.

Answer 2

I think that it is a strength because you use so many muscles:

Arms, Legs, Stomach & many more.