Introduction:
Fluid friction is a type of friction that occurs between the layers of a fluid as they move relative to each other. It can be minimized by various methods, such as adding salts to the fluid, increasing volume, giving suitable shape, and decreasing volume. Among these options, giving a suitable shape is the most effective way to minimize fluid friction.

Explanation:
Fluid friction can be minimized by giving a suitable shape to the object moving through the fluid. This is because the shape of an object greatly affects the amount of fluid friction it experiences. When an object moves through a fluid, such as air or water, the fluid molecules come in contact with the surface of the object. The shape of the object determines how the fluid molecules interact with its surface, and this interaction determines the amount of fluid friction.

Importance of Shape:
The shape of an object can either increase or decrease the fluid friction it experiences. A streamlined or aerodynamic shape, such as that of an airplane or a fish, reduces fluid friction by allowing the fluid to flow smoothly around the object. This shape minimizes the disturbance caused by the object moving through the fluid, resulting in less resistance and friction.

On the other hand, an irregular or non-streamlined shape increases fluid friction. This is because the irregular shape disrupts the flow of the fluid around the object, causing turbulence and increasing resistance. For example, a rough surface or protrusions on an object can create more drag and increase fluid friction.

Example:
To understand the concept better, let's consider the example of a boat. A boat with a flat-bottomed shape experiences more fluid friction compared to a boat with a streamlined hull. The flat bottom of the boat disrupts the flow of water, creating turbulence and increasing resistance. In contrast, a boat with a streamlined hull allows the water to flow smoothly around it, reducing fluid friction and allowing the boat to move more efficiently.

Therefore, giving a suitable shape to an object moving through a fluid is the most effective way to minimize fluid friction. This can be achieved by designing objects with streamlined shapes that minimize disturbances and allow the fluid to flow smoothly around them.

Option C is correct because by giving a suitable shape it reduces contact with the object so there is less friction .