What attaches to the bone on one end and two cementum on the other end and allows for slight movement of a tooth?

The periodontal ligament is the correct choice because it is a specialized connective tissue that helps anchor the tooth to the alveolar bone while allowing for slight movement during chewing and other functional activities. This ligament provides a cushioning effect, absorbing forces exerted on the tooth and enabling it to withstand various pressures without causing damage to the surrounding bone or the tooth itself. The slight mobility it provides is essential for proper oral function and health.

The alveolar process refers to the bone structure that surrounds and supports the teeth, but it does not have the same properties of allowing for movement. Gingival tissues are the soft tissues surrounding the teeth and do not directly connect the tooth to the bone like the periodontal ligament does. Dental pulp is the innermost part of the tooth containing nerves and blood vessels; it does not play a role in attaching the tooth to the bone or allowing movement. Thus, the periodontal ligament is uniquely suited for this role.