Answer:
tropical grassland,steppe grassland, temperate grassland
Evidence.
This are the two things explanations need: testability and evidence. Both of them are very important but evidence, I'd say, is the most important factor since it supports the claim in a remarcable way.
Hope it helped,
BioTeacher101
A new moon
Definition of new moon:
the phase of the moon when it is in conjunction with the sun and invisible from earth, or shortly thereafter when it appears as a slender crescent.
Light blue! needs to come from both parents