Which of the following is a common problem of the genitourinary system?

Dehydration is a common problem of the genitourinary system because the kidneys play a crucial role in regulating fluid balance in the body. When the body is dehydrated, it can lead to a variety of issues affecting the genitourinary system, including concentrated urine, kidney stones, and impaired kidney function. The kidneys help filter waste products and maintain homeostasis, so when they're not receiving enough fluid, their ability to function properly can be compromised.

While anemia, arthritis, and pneumonia can all impact overall health, they are not specifically tied to the genitourinary system. Anemia primarily involves the blood and bone marrow, arthritis affects the joints, and pneumonia pertains to the lungs. Therefore, these conditions do not directly relate to issues typically encountered within the genitourinary system.