Which is least likely to be a reservoir for fresh water?

Life on Earth has had to adapt different hydrologic conditions and therefore it affected most of our topography. The last ice age had so much glaciers and snowpacks. Now, little of the ice has left in parts of the Atlantic and Antarctic region. Glaciers are the huge storage of freshwater.

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.