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Salma had a very soft and smooth skin during her childhood. As she entered adolescence, she developed pimples on her face. The skin specialist advised her to wash her face at regular intervals. Can you explain the reasons for the appearance of pimples on her face and suggest ways to prevent them?
 
Answer variants:
Excess oil opens the skin pores.
Secretion of sweat/oil glands decreases.
Secretion of sweat/oil glands increases.
Excess oil blocks the skin pores.
Regular face wash keeps the face clean