I think it’s the push ups test.
Hope it helps!
Brainliest would be nice if you want to! :)
Stabilizing selection... I think it might be right if I'm wrong, sorry if I am.
Answer:
Delta waves
Explanation:
Stage 3 and stage 4 are described as slow wave sleep that is marked by a predominance of delta waves
The other two components of the health triangle are C, Physical health, and D, Social health.