What is a consequence of water deficiency in the body?

Water deficiency, or dehydration, leads to fluid loss in the body as the body struggles to maintain normal function without adequate hydration. Water plays a crucial role in various physiological processes, including regulating body temperature, transporting nutrients, and removing waste. When hydration levels drop, the body begins to conserve water, which can result in decreased overall fluid volume. This fluid loss can manifest in various ways, such as dry mouth, reduced urine output, fatigue, and decreased physical performance.

In contrast, the other options do not accurately represent the consequences of dehydration. Weight gain is usually associated with excess fluid retention or calorie surplus, and not with dehydration. Increased muscle mass requires adequate hydration to support muscle performance and recovery, as water is essential for cellular function and metabolic processes. Lastly, an enhanced immune response typically relies on a well-hydrated body for optimal performance, as dehydration can weaken the immune system and decrease its ability to fight off infections.