What is one effect of alcohol on the body’s hydration levels?

Alcohol consumption has a significant effect on the body's hydration levels, primarily contributing to dehydration. When alcohol is ingested, it acts as a diuretic, which means it promotes the increased production of urine. This increased urination can lead to a loss of fluids and electrolytes in the body, resulting in a state of dehydration.

The dehydration caused by alcohol is also a key factor in the development of hangovers, which are commonly experienced after heavy drinking. Symptoms of a hangover often include headaches, fatigue, and thirst, all of which are exacerbated by dehydration. Therefore, the correct choice highlights the detrimental impact alcohol has on hydration, emphasizing that it leads to dehydration and associated negative effects on the body.