Which letter in the diagram corresponds to the graph that represents the total amount of freshwater and saltwater in the world?

Freshwater

Water that has a low salt content, found in rivers, lakes, streams, and underground, essential for drinking, agriculture, and industry.

Saltwater

Water containing a significant concentration of salts, typically found in oceans and seas, as opposed to freshwater in lakes and rivers.

Diagram

A simplified drawing or plan that represents the components or workings of something, typically used to explain how it functions or is structured.