My answer is B Because when you train it’s a pressure and when the pressure get to your heart then your heart will raise.
Keep a balanced diet eat alot of fruit especially bananas
Well generally it will be a positive impact (Of course this generally depends on what the "Physical activity" is, it is generally good, reason being while exercising causes the brain to release endorphin's, as well as helping relax muscles and relieve physical tension, which can greatly help with stress.
The hair, skin, and nails are part of the integumentary system. This system grows from biotin.
Answer: D) Integumentary
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