Answer:
B) Valves closing
Explanation:
A healthy heart makes a lub-dub sound with each beat. This sound comes from the valves shutting on the blood inside the heart. The first sound (the lub) happens when the mitral and tricuspid valves close.
Mental health is what you are thinking in your head. Physical health is what you are actually doing and how you do them.
<span>False because plants need to fix nitrogen in order to take it in.
hope it helped</span>
The answer is true as marking a license plate will not stop drunk driving...
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