Correct option is A
Gravity flow:-Gravity flow refers to the movement of fluids driven by the force of gravity. In this type of flow, the fluid moves from a higher elevation to a lower elevation without the need for external energy sources like pumps. Gravity flow iscommonly observed in natural water bodies, drainage systems, and certain irrigation setups.
Pressure Flow:- Pressure flow involves the movement of fluids under the influence of an external pressure source. This pressure is often generated by pumps or other mechanical devices. Pressure flow allows the fluid to be transported to higher elevations, over long distances, or against resistance, such as friction in pipes.
