Final answer:
The crown of a tooth is covered by enamel, which is the hardest material in the human body, designed to protect the tooth during biting and chewing.
Step-by-step explanation:
Enamel serves as a protective outer layer to withstand the forces of biting and chewing. Beneath the enamel is a layer of dentin, a bone-like tissue that extends into the root of the tooth around the innermost pulp cavity. The pulp cavity contains the pulp chamber at the top of the tooth and the pulp canal, or root canal, located in the root. The tooth's root, as well as some of the crown, is covered with cementum, which, along with the periodontal ligament, helps to anchor the tooth in the jawbone.