Final Answer:
The process where the kidney removes and then reabsorbs substances is called Reabsorption. Option C is the answer.
Step-by-step explanation:
Reabsorption is a vital process in the functioning of the kidneys. It occurs after the initial filtration of blood in the renal corpuscles, where waste products and excess substances are removed. During reabsorption, essential substances like water, ions, and nutrients are selectively transported back into the bloodstream from the renal tubules. This process ensures that valuable substances are retained by the body, contributing to maintaining a proper balance of electrolytes, fluids, and other essential components. Options a) Osmosis, b) Filtration, and d) Diffusion are involved in various renal processes, but reabsorption specifically refers to the retrieval of substances by the renal tubules.
Option C is the answer.