What is the primary composition of urine?

The primary composition of urine is 95% water and dissolved ions. Urine is primarily produced by the kidneys as they filter blood and remove waste products, excess substances, and toxins. The majority of the composition being water is critical for maintaining hydration and assisting in the excretion of soluble wastes.

Dissolved ions, including sodium, potassium, and chloride, are also significant constituents. They play essential roles in several bodily functions, including regulating osmotic balance and electrical activity in cells. The high water content helps to dilute these wastes, making it easier for the body to eliminate them efficiently.

The other provided options incorrectly represent the composition of urine, with none reflecting the significant role of water as a major component.