Organs that eliminate water and waste products are the:

The kidneys are the primary organs responsible for eliminating water and waste products from the body. They function by filtering blood, removing excess substances, and producing urine, which is then excreted through the urinary tract. The kidneys play a critical role in maintaining the body’s fluid and electrolyte balance, regulating blood pressure, and supporting overall homeostasis.

While the liver is involved in detoxifying harmful substances and metabolizing carbohydrates, fats, and proteins, it is not primarily focused on water and waste elimination in the same manner as the kidneys. The lungs are responsible for gas exchange, primarily oxygen and carbon dioxide, and while they do expel some water vapor, they do not eliminate waste products in the same context as the kidneys. The heart, on the other hand, pumps blood throughout the body but does not play a direct role in waste elimination.

Given these functions, the kidneys are clearly identified as the key organs in the process of eliminating water and waste from the body, making this the correct choice.