2. A hit used on a ball below the shoulders

1. Bump
2. Set
3. Serve
4. Spike

Bump

Explanation:

Also called the forearm pass; An underhand pass hit with your forearms when the ball is below your shoulders; used to receive the serve.

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) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.