The process that is shown below that doesn't make use of energy is osmosis which is illustrated in diagram C.
What is osmosis?
Osmosis can be defined as the movement of water molecules from the region of higher solute concentration to the region of lower solute concentration.
This process doesn't energy because substances move down the concentration gradient, from high to low concentration.
Therefore, process that is shown below that doesn't make use of energy is osmosis which is illustrated in diagram C