The area of Earth where ozone is primarily produced is in the tropics.
<span>The group of nursing students show their understanding of expectorants when they are able to identify the medication called guaifenesin. Guaifenesin is sold under the brand name Robitussin. Guaifenesin, an expectorant, is used in Robitussin specifically to relieve a person's cough and chest congestion.</span>
D. Muscles are the only tissue in the body that can contract, and are responsible for all movement.
