Question

where is most of the freshwater on earth stored?
a in reservoirs used to supply human settlements with water.
b in lakes and streams.
c frozen in glaciers and other forms of ice.
d in the depths of the ocean.

Explanation:

Earth's freshwater is mostly locked in frozen forms, as surface water (reservoirs, lakes, streams) makes up a small fraction, and ocean water is saltwater, not freshwater.

Answer:

c. Frozen in glaciers and other forms of ice.