What is one common sign of alcohol intoxication?

Slurred speech is a well-documented indicator of alcohol intoxication. When a person consumes alcohol, it affects the central nervous system, impairing motor coordination and cognitive functions. This can lead to difficulty in articulating words clearly, resulting in speech that sounds slurred or slowed. This symptom is often observed and can be an important factor in assessing whether an individual is under the influence of alcohol.

In contrast, the other options—such as increased alertness, heightened concentration, and improved balance—are not typically associated with alcohol consumption. Instead, alcohol tends to produce effects that decrease alertness, impair concentration, and lead to a loss of coordination or balance. Therefore, slurred speech stands out as a recognized sign of intoxication.