The process of the plasma membrane pumping excess sodium out of a cell into an environment where there is a lower concentration of sodium is called
question 9 options:

diffusion.

osmosis.

active transport.

coupled transport.

Active transport

Explanation:

The pumping of sodium ions out of the cell into the environment where there is a lower concentration is achieved through active transport. Active transport is the movement of molecules or ions against a concentration gradient across living cell membranes with the utilization of ATP. Active transport takes place through carries located in the membrane.

i believe the answer would be b. hope it : )