Question

root word: hydro = waterwhat does the word below mean? hydrometer a type of rare desert animal an instrument for measuring liquids a light that is yellow or orange in color

Explanation:

The root word "hydro" means water. The suffix "-meter" means a measuring instrument. Combining them, "hydrometer" is an instrument related to measuring something about water (liquids in general as water is a liquid). The first option about a desert animal has no relation to "hydro" (water). The third option about color has no connection to the root meaning.

Answer:

an instrument for measuring liquids