I think it’s a. the use of bolding, font size, and headlines
<h2>
The skin</h2>
The skin is the largest organ of the body. The skin and its derivatives (hair, nails, sweat and oil glands) make up the integumentary system. One of the main functions of the skin is protection. It protects the body from external factors such as bacteria, chemicals, and temperature.
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Answer: Her face and a mirror.
Explanation:
In the passage, the speaker makes direct reference to (her) face being like a mirror, reflecting how he felt and showing his own expressions and thoughts.
A statement of the main ideas of a lecture or printed material in your own words
