Answer:
b. Reabsorption.
Explanation:
The three main process in the formation of urine is glomerular filtration, tubular reabsorption and tubular secretion. These three process occurs at the same or different structure.
Tubular reabsorption may be defined as the process bu which water and ions are removed from the nephrons and enters into the blood. The important chemicals and molecules are reabsorbed placed back into the renal tubule.
Thus, the correct answer is option (b).
