Which of the following is a common symptom of dehydration?

Dry skin is a common symptom of dehydration because when the body lacks sufficient fluids, it prioritizes water distribution to vital organs over less critical areas, such as the skin. As a result, the skin loses its moisture, leading to dryness and, in some cases, flakiness or irritation. Dehydration decreases the skin's ability to maintain its elasticity and overall health, making it appear dull and potentially rough.

In contrast, increased energy typically does not occur with dehydration; it is more likely to lead to fatigue and weakness. Frequent urination is often associated with adequate hydration and fluid intake, while dehydration usually results in reduced urine output. Weight gain does not generally correlate with dehydration; instead, dehydration often leads to temporary weight loss due to fluid loss from the body.