How does Dee Brown use imagery in Bury My Heart at Wounded Knee?

Examples of Imagery:

“To the Indians it seemed that these Europeans hated everything in nature - the living forests and their birds and beasts, the grassy grades, the water, the soil, the air itself.”

“The white people were as thick and numerous and aimless as grasshoppers, moving always in a hurry but never seeming to get to whatever place it was they were going to.”

“I was born upon the prairie, where the wind blew free and there was nothing to break the light of the sun. I was born where there are no enclosures and where everything drew a free breath. I want to die there and not within walls."