What are the signs of dehydration?

Dehydration occurs when the body loses more fluids than it takes in, leading to a deficiency in water and electrolytes. The signs associated with dehydration are important indicators that help in diagnosing the condition effectively.

The correct answer includes signs such as dry mouth, thirst, decreased urine output, and fatigue. A dry mouth is a primary symptom of dehydration because there is insufficient saliva production due to reduced fluid levels. Thirst is the body's natural response, signaling that it requires more fluids to maintain balance. Decreased urine output occurs as the kidneys conserve water to compensate for the loss, typically resulting in darker urine. Fatigue is a common symptom as dehydration can lead to decreased blood volume, resulting in reduced oxygen and nutrient delivery to tissues.

Other options reflect symptoms or signs not typically associated with dehydration. For example, increased appetite does not relate to fluid loss, and frequent urination and wet skin could suggest overhydration or other conditions. Swelling of the limbs is more indicative of fluid retention or other medical issues, rather than dehydration itself. Thus, the selection of dry mouth, thirst, decreased urine output, and fatigue accurately captures the essence of dehydration symptoms.