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.
The correct answer is A
Genetic predispositions to learning influence personality development.
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compulsive overeating disorder is your answer!
Hope this helps! :D
B
I think I have did that before
