- Most means over 50% of something
- Ice caps and glaciers contain 69% of freshwater on earth
- So, ice caps and glaciers contain most of the freshwater on earth

- Ice caps and glaciers contain most of the freshwater on earth
- Glaciers are a kind of major reservoir
- Hence, glaciers are a major reservoir that contains most of the freshwater on earth

- Glaciers are a major reservoir that contains most of the freshwater on earth
- Ice sheet is a kind of glacier
- Therefore, ice sheets are a major reservoir that contains most of the freshwater on earth

Therefore, ice sheets are a major reservoir that contains most of the freshwater on earth
Question
Which type of water reservoir contains the largest volume of fresh water?

Context
- Most means over 50% of something 
- Ice sheet is a kind of glacier 
- Glaciers are a kind of major reservoir 
- Ice caps and glaciers contain 69% of freshwater on earth