Which of the following is a common sign of dehydration in a client?

Dry skin is indeed a common sign of dehydration. When the body lacks adequate fluids, it often manifests through the skin, which may become less elastic, appear dry, and even show flakiness or cracking. Proper hydration helps maintain skin moisture and overall health; thus, when dehydration occurs, the skin is one of the first areas to display visible signs.

The other options do not align with typical dehydration signs. Increased appetite is generally not associated with dehydration, as the body usually signals thirst, not hunger. Excessive urination can occur in other conditions, such as diabetes or excessive fluid intake rather than being a sign of dehydration. Elevated body temperature can occur in various states, but it is not directly indicative of dehydration. Instead, dehydration might lead to lower body temperatures in some cases due to reduced sweating.