Mandible
Rib
Sternum
Ulna E. Pinna
Answer is Right!
Answer is Wrong!
The answer is E. Pinna.
A mandible is the lower jaw bone. Ribs are long, curved bones that form the rib cage. The sternum is the breastbone. The ulna is one of the two bones in the forearm. The pinna is the external ear.
The pinna is the only option that is not a bone. It is a fleshy, external structure that helps to collect sound waves. The other options are all bones that are part of the skeletal system.