What is a known risk factor for Attention-Deficit/Hyperactivity Disorder (ADHD)?

Parental alcohol consumption is considered a known risk factor for Attention-Deficit/Hyperactivity Disorder (ADHD). Prenatal exposure to alcohol can disrupt normal neurological development in a fetus, leading to cognitive, behavioral, and attention-related issues as the child grows. This connection is particularly significant because the effects of alcohol can interfere with brain development during critical periods, potentially contributing to the symptoms associated with ADHD.

In terms of the other options, poor nutrition in childhood, while it can affect overall development and health, is not directly linked as a primary risk factor for ADHD. Frequent exercise during infancy can have various benefits for a child's development, but it is not a recognized risk factor for ADHD. Finally, high socioeconomic status generally correlates with better access to resources and support systems, thus it is not considered a risk factor for this disorder.