Why does antidiuretic hormones help regulate an abnormal increase in solute concentration in the exctracelluar fluid?

Antidiuretic hormone (ADH), also known as vasopressin, helps regulate an increase in solute concentration in the extracellular fluid by promoting water reabsorption in the kidneys. When solute concentrations rise, ADH is released, signaling the kidneys to conserve water, which dilutes the extracellular fluid and restores osmotic balance. This mechanism helps maintain homeostasis by ensuring that the body's fluid balance is preserved, preventing dehydration and related complications.