Which letter in the diagram corresponds to the system that is fairly efficient and uses pumps to spray water on a crop?

Fairly Efficient

Describes a process or system that achieves its goals with a reasonable amount of resources or effort.

Pumps

Mechanical devices used to move fluids (liquids or gases) from one place to another, often by creating a vacuum or pressure difference.

Crop

A crop is a plant or plant product that can be grown and harvested extensively for profit or subsistence.