The answer would be "D. TRACHEA". It is because the first part of the pharynx which is the nasopharynx transports air from the nose down to your throat and eventually to the lungs where gas exchange between carbon dioxide and oxygen occurs.
It's true :)
Flexibility<span> is the range of motion around a joint, and can refer to ligaments, tendons, muscles, bones, and joints. If a joint has good range of motion then it would be able to move in all planes and directions permitted to that joint.</span>
A. Inconsistently collected data
