Question

grasslands are defined by:
○ dominance of trees
○ dominance of rocks
○ dominance of shrubs
○ dominance of grasses

Explanation:

Grasslands are ecosystems where the dominant vegetation is grasses. Trees are dominant in forests, rocks are not vegetation, and shrubs are more dominant in shrublands. So grasslands are defined by the dominance of grasses.

Answer:

D. Dominance of grasses (assuming the last option is labeled D; if the options are unlabeled, it's "The last option: Dominance of grasses")