The researchers must target an area called the nucleus accumbens (NAc).
When an individual practices an activity that stimulates the nucleus accumbens, the sensations that these regions provoke make the individual have the need to repeat the activity, which ends up creating addiction.
Therefore, the nucleus accumbens (NAc) is the brain area that scientists must target.
More information about dopamine is in the link:
https://brainly.com/question/4560426