Question

which of the following qualities determines if an area should be considered a grassland?
height of plants
amount of stored carbon in soil
location
amount of precipitation

Explanation:

Grasslands are defined mainly by their climate - specifically the amount of precipitation. They receive too little precipitation to support a forest but more than deserts. Plant height, carbon storage, and location are secondary factors compared to precipitation in classifying a grassland.

Answer:

Amount of precipitation