Body fat is incorporated into which of the following? tooth enamel hair mammary glands nerves

The correct answer is:<br /><br />**mammary glands**<br /><br />### Explanation:<br />Body fat is an essential component of mammary glands. Mammary glands are specialized organs in mammals that produce milk to nourish offspring, and they contain a significant amount of adipose (fat) tissue. This fat tissue provides structural support and energy reserves for milk production.<br /><br />- **Tooth enamel**: Tooth enamel is the hard, outermost layer of teeth and does not contain fat. It is primarily composed of minerals like hydroxyapatite.<br />- **Hair**: Hair is made up of keratin, a protein, and does not incorporate body fat.<br />- **Nerves**: While nerves are surrounded by myelin sheaths (which are lipid-rich), this is not the same as body fat.<br /><br />Thus, **mammary glands** is the most appropriate choice.