Final answer:
Nicotine, heroin, cocaine, opioids, cannabinoids, and amphetamine increase the release of dopamine, prolonging its stimulation of the VTA, which leads to their frequent use.
Step-by-step explanation:
The frequent use of drugs such as nicotine, heroin, cocaine, opioids, cannabinoids, and amphetamines is due to their ability to increase the release of dopamine and prolong its stimulation of the ventral tegmental area (VTA) in the brain. The VTA is responsible for reward cognition, associative learning, and motivation. When these drugs enhance the release of dopamine in the VTA, they create a pleasurable and rewarding sensation, leading to the drugs' frequent use.