Final answer:
Alcohol affects various aspects of the body, including reaction time, vision, hearing, and sense of taste. The first thing affected after drinking an alcoholic beverage is reaction time.
Step-by-step explanation:
Alcohol affects various aspects of the body, including reaction time, vision, hearing, and sense of taste. However, the first thing that is affected after drinking an alcoholic beverage is reaction time. As alcohol enters the bloodstream, it impairs the central nervous system, slowing down the brain's ability to process information and respond quickly. This can result in delayed reactions and increased risk of accidents or injuries.