Examlex
The __________________________stage of demographic transition is when the birth rate declines to a point equaling the death rate and at which the population growth is zero.
Withdrawal
The process of reducing or eliminating the intake of a substance to which one has become dependent or addicted, often accompanied by physiological and psychological effects.
Depressant
A substance that reduces the functional or nervous activity of the body, often used to induce sedation.
Stimulant
A substance that raises levels of physiological or nervous activity in the body, generally increasing alertness, attention, and energy.
Opiates
A group of drugs derived from opium used for their analgesic properties, but also known for their high potential for addiction.
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