Answer:
A. The atria are contracting and pushing blood into the bottom ventricles of the heart.
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B could be an applicable answer. B is showing how they are feeling in other worrds they are being empathetic
Answer:
brainlest??
Explanation:
yes, bacteria can be both helpful and harmful to the human body, it can help digest food, breaks down carbohydrates and toxins, and help absorb the fatty acids that which cells need to grow.
