Question

which of these is a function of an antibiotic?
a substance designed to remove or kill bacteria
a substance designed to remove or kill a virus
a substance that causes bacteria to grow faster

Explanation:

Antibiotics are substances that target bacteria. They work by either killing bacteria or inhibiting their growth. Viruses are not affected by antibiotics; antiviral drugs are used for viruses. A substance that causes bacteria to grow faster is the opposite of what an antibiotic does.

Answer:

a substance designed to remove or kill bacteria