Question

much of this is frozen glaciers and ice caps, so we dont consider it usable. (1 point) salt water fresh water rainwater ice

Explanation:

Most fresh - water on Earth is locked up in glaciers and ice caps and not easily accessible for use. Salt water is in oceans and seas and not mainly in glaciers. Rainwater is a form of fresh - water but not what is mainly frozen in glaciers. Ice is a state, and the main substance frozen in glaciers and ice caps is fresh - water.

Answer:

Fresh water