What are the 3 characteristics of GOOD background research?

bc blah

explanation:

bc blah

b brown mice / white sand dunes

thinking it would be physical characteristics

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101