Gender expression is how, for example, a female or male shows their way of either feminity or masculinity. It is how a person expresses their thoughts and opinions of being that particular gender by either wearing certain clothes or styling their hair in a certain way.
It is found in the bones <span>such as hip bone, breast bone, </span>skull<span>, ribs, </span>vertebrae<span> and shoulder blades, and in the cancellous ("spongy") material at the proximal ends of the long bones </span>femur<span> and </span>humerus<span>. </span>
Respiratory system hope i helped best of luck :)
Although most of these are opinions, the most likely answer is:
C) a common drug used for relaxation
