How does tolerance to alcohol affect a drinker?

Tolerance to alcohol refers to the body's adaptation to the presence of alcohol, resulting in a diminished response to its effects over time. When someone develops a higher tolerance, they need to consume increased amounts of alcohol to achieve the same level of intoxication or effects they previously experienced with smaller quantities. This phenomenon occurs as the body becomes more efficient at metabolizing alcohol and the brain adjusts to its effects, requiring larger doses to produce the desired outcome.

In contrast, lower tolerance would mean that less alcohol is needed to achieve intoxication, which does not apply here. The statement about becoming immune to alcohol's effects is misleading, as tolerance does not confer immunity; it simply alters the required quantity to feel those effects. Additionally, while high tolerance can increase susceptibility to alcohol poisoning, it is predominantly characterized by the need for increased consumption rather than less. The correct answer highlights the critical aspect of tolerance that directly impacts drinking habits and can lead to dangerous patterns of alcohol use.