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Final answer:Sebum is not responsible for A)body temperature regulation,which is a function of sweat glands. It is, however, responsible for making the skin oilier during adolescence, killing bacteria, keeping the skin soft and moist, and preventing hair follicles from brittleness.Explanation:Sebum makes the skin oilier, especially during adolescence when hormonal changes stimulate sebaceous glands. It also has antibacterial properties, keeping skin surface free from microbial growth, thus helping tokill bacteria.Additionally, sebumkeeps the skin soft and moistand prevents hair follicles from becoming brittle. However, sweat glands, not sebaceous glands, produce sweat that helps with body temperature regulation by cooling the body surface....