Which of the following is a biological factor that can influence addiction?

Genetic predisposition is a biological factor that can influence addiction because it refers to the hereditary traits and variations that individuals are born with, which can affect their likelihood of developing addictive behaviors. Research has shown that genetics can account for a significant part of the risk for addiction, with studies indicating that individuals who have a family history of substance use disorders are more likely to develop similar problems themselves. Genetic factors can affect how a person's body processes substances, their brain chemistry, and their vulnerability to environmental triggers, all of which can contribute to the development of addiction.

In contrast, environmental stressors, peer pressure, and socioeconomic status are primarily social or environmental factors that, while they may certainly impact the risk of addiction, do not pertain to the biological aspects of an individual's makeup. These factors can interact with genetic predispositions to increase the overall risk, but they do not directly fall under the category of biological influences. Understanding the role of genetics helps in comprehending the complex interplay of biology, environment, and personal circumstances in the realm of addiction.