Answer:
ice caps is the correct answer.
Step-by-step explanation:
The largest source of available freshwater on Earth is ice caps.
Freshwater is a naturally occurring water and concentration of the dissolved salts is low.
Fresh water carries water in ice caps as the largest sources and water in glaciers, ponds, lakes, streams, rivers, ice sheets.
Antarctica contains 90% of the fresh water on the Earth's surface but it is iced in the form of the ice caps.