Which of the following is a physical effect of alcohol consumption?

The correct response highlights relaxation and a loss of some judgment as a physical effect of alcohol consumption. Alcohol is a depressant, which means that it primarily affects the central nervous system by slowing down brain function and impairing cognitive processes. As a result, individuals consuming alcohol may experience a sense of relaxation due to its sedative properties. This can also lead to diminished judgment, making it harder for a person to assess situations accurately, which is a significant concern, especially in contexts like driving.

In contrast, the other options describe effects that are not typically associated with alcohol consumption. For example, increased muscle agility and heightened alertness and perception suggest heightened physical capabilities and awareness, which contradict the depressant nature of alcohol. Additionally, reduced need for sleep is not an effect of alcohol; in fact, moderate to high alcohol intake is often associated with disrupted sleep patterns and reduced sleep quality. Thus, the choice emphasizing relaxation and diminished judgment accurately captures the common physical effects experienced during alcohol consumption.