Which of the following is the largest freshwater source?

Which of the following is the largest freshwater source?

مندرجہ ذیل میں سے میٹھے پانی کا سب سے بڑا ذریعہ کون سا ہے؟
Explanation

Glaciers are the largest source of freshwater on Earth, holding about 69% of the world's fresh water.

It primarily in ice sheets and polar regions.