Without restoration, if excess water passes out from the tissues of kidney, the cells would

The correct option is "not get affected at all".

To understand why, let us look at the homeostatic mechanisms of the human body, specifically regarding fluid balance and kidney function.

The kidneys are responsible for regulating the volume and osmolarity of extracellular fluid (including blood plasma and interstitial fluid). If there is excess water in the body, the kidneys excrete this surplus by producing dilute urine to maintain a constant osmolarity.

If excess water is being eliminated ("passes out") from the kidney tissues/tubules during normal excretory processes, it does not alter the isotonic balance of the kidney cells themselves. The body's feedback loops and the osmotic pressure of the blood plasma ensure that cells are protected from drastic shifts in water volume. Therefore, the cells will not shrivel, burst, or be forced to draw excess water pathologically; instead, they will not get affected at all.