Answer:
Trying to improve yourself is great! It really depends on your age, but you should always have a healthy, balanced diet. You should eat nutritious foods like fruits and veggies, and also build on protein like chicken or fish. You can eat junk food once in a while like chips, or you can switch to whole grain snacks instead like sun chips instead. I hope this helps you become a better volleyball player.
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These all sound good for parents to do
I'm almost positive that this is DNA. LMK if I'm correct.
Answer:
Human subject research is systematic, scientific investigation that can be either interventional (a "trial") or observational (no "test and Human subject research can be either medical (clinical) research or non-medical (e.g., social science) research.