Question

1. depressants

alter the users perceptions and cause changes in the way a person sees, hears or experiences touch.
are drugs that slow down the central nervous system.
are substances that give off fumes that act on the brain
a drug that comes from the leaves and contains the active ingredient thc
other:

Explanation:

Depressants are drugs that slow down the central nervous system. They work by affecting neurotransmitters in the brain, reducing the activity of the nervous system. This can lead to feelings of relaxation, drowsiness, and decreased anxiety. Examples of depressants include alcohol, benzodiazepines, and barbiturates.

The first option describes hallucinogens, which alter perceptions. The third option describes inhalants. The fourth option describes marijuana (THC is the active ingredient in marijuana, but marijuana is not a depressant in the traditional sense as it has both stimulant and depressant - like effects in different aspects).

Answer:

are drugs that slow down the central nervous system.