You may have to take extra of these if you have asthma, a skin problem. they are often abused for body building.

Clenbuterol is famous drug used as an asthma treatment, but is widely known as a bodybuilding drug. Clenbuterol is a sympathomimetic amine, which is a stimulant. Inhaled steroids are used for asthma, and anabolic steroids are used for bodybuilding. Another famous drug for asthma and bodybuilding is Albuterol. I would suggest choosing a drug that matches the closest to what you are learning right now.

The littoral zone. . .

Your answer is a because that is true