Which substances are included in the category of related substances?

The selection that encompasses ADHD (Attention Deficit Hyperactivity Disorder), ADD (Attention Deficit Disorder), and HGH (Human Growth Hormone) accurately reflects the category of related substances due to their broader implications in sports and performance contexts. ADHD and ADD are conditions often treated with medications that can influence concentration and performance, which is relevant for athletes seeking a competitive edge.

HGH is recognized for its potential performance-enhancing effects, especially in promoting recovery and muscle growth. These substances are often scrutinized in the context of sports regulations because their usage can intersect with issues of fairness, health, and the integrity of competition, making them significant in discussions about doping and athlete management.

The other choices do not encompass the same breadth of issues related to performance and regulation. For instance, caffeine and alcohol, while noteworthy, do not typically fall under the same scrutiny as performance-enhancing drugs in terms of competition ethics and health risks. The reference to anabolic steroids alone also misses the wider context of performance-enhancing substances, as it excludes many medications and substances that can impact athletic performance. Performance enhancers being mentioned alone might limit the focus to a narrower range of substances without considering the intricacies of various related conditions.