Question

1. what is a drug? *

a chemical substance, natural or human made, that changes body functions in some way.
drugs are something that changes a persons mental or physical state.
a substance intended for use in the diagnosis, cure, treatment, or prevention of disease. prescription drugs
all of the above

Explanation:

• A drug can be a chemical substance (natural or human - made) that alters body functions.
• It can also change a person's mental or physical state.
• Additionally, substances for diagnosis, cure, treatment, or prevention of disease (like prescription drugs) are drugs.

Answer:

All of the above.