Final answer:
Cocaine and amphetamine both boost dopamine activity in the body by preventing its reuptake and stimulating its release.
Step-by-step explanation:
Cocaine and amphetamine both boost the activity of dopamine in the body. Cocaine prevents nerve cells from taking up dopamine from the synapse, resulting in higher levels of dopamine available to stimulate the pleasure centers of the brain. Amphetamines block the reuptake of dopamine and stimulate its release, leading to increased neurotransmitter activity.