Final answer:
Free Gingiva, Attached Gingiva, and Cameo Surface are related to Gingival structure (D), and are critical components of the gum tissue surrounding and supporting the teeth in the oral cavity.
Step-by-step explanation:
The Free Gingiva, Attached Gingiva, and Cameo Surface are related to D) Gingival structure. The gingivae, or gums, are an essential component of the oral cavity supporting the teeth. The free gingiva is the part of the gum that surrounds the tooth and is not directly attached to the tooth or the bone; it forms the gingival sulcus or crevice around the tooth. The attached gingiva is the part that is tightly bound to the underlying bone and the teeth by fibrous tissue. The cameo surface, or alveolar mucosa, is the smooth, non-keratinized mucosal surface facing the cheek. These structures, alongside the periodontal ligament, play key roles in maintaining oral health and tooth stability within the alveolar processes of the maxilla and mandible.