Answer:
option 2 is correct=> increased NaCl reabsorption in the ascending limb.
Explanation:
This question want to test us on the the usefulness of the thick descending limb of the nephron loop. The main purpose of the thick descending limb of the nephron loop is to make sure that there is support for the Calcium ions, Sodium ions, magnesium ions and potassium ions. The other uses or say importance is its role in homeostasis and in the concentration of urine.
There is more of absorption of water function in the descending limb of the nephron loop because of the permeability and as the absorption of water increased the ascending limb acts a a co-transporter and there will be an increasing absorption of sodium Chloride in the ascending limb.