Action of Aldosterone in the Human Body

Human physiology is critical for understanding how different organs and systems contribute to overall health. One important aspect is the role of the kidneys in regulating body fluids and electrolyte balance. The kidneys filter blood, remove waste, and adjust the concentration of urine based on the body's needs. An important hormone involved in this process is aldosterone, which helps to control sodium levels in the blood.

Which of the following is a primary action of aldosterone in the human body?