Along with other distinct traits, robust australopithecines had large adapted for grinding food.

a. premolars and molars

c. front teeth and small back teeth

b. temporalis muscles and a sagittal crest

d. both a. and b.

Both a. and b.

Explanation:

Premolar and molar teeth are part of your body. Teeth are a crucial part of the body that helps in chewing and digesting food. The teeth are made up of some proteins such as collagen and some minerals such as calcium. Teeth help us in speaking. We have around 32 teeth which are called permanent or secondary teeth.

There are 8 incisors, 4 canines, 8 premolars and the 12 are molars. Children have only 20 teeth. The premolar and molar as well as temporalis muscles and sagittal crest help in cutting, chewing, and digestion of food.

answer; american middle class;