The occlusal refers to what part of the tooth?
a. surface of the tooth that faces away from the midline
b. surface of the tooth that face the tongue
c. chewing surface of all posterior teeth
d. biting edge of all anterior teeth

c. Chewing surface of all Posterior teeth.

Explanation:

Teeth in animal and human body plays important role in beginning the simplification of complex food entity inside the mouth. It exhibit various surfaces for various purposes like cutting, chewing, and grinding.

Occlusal surface refers to the surface of the posterior tooth which performs the function of chewing and grinding.

osteogenesis imperfecta (oi) refers to a congenital ailment of bones. in the condition, the bones become brittle or fragile. this ailment is a general result of the defect or mutations in the genes (colia1 or colia2). this mutation results in imperfect collagen formation either in quantity or quality wise.  

there are eight kinds of oi defects, and each kind varies with certain distinctions in symptoms. the usual symptoms include frequent bone fractures, loss of hearing in infants, protruding eyes, discoloration of the white in the eyes, respiratory issues, loosening of the joints, short stature, and other symptoms.