Eating sweet potato provides energy for human metabolic process. the original source of this enerfy is the energy

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explanation:

i think that d. wind is the answer.   i missed the question when i answered a. currents.

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.