How does Gary Paulsen use imagery in Soldier's Heart?

Imagery:

"Make it stop now! Charley thought, or thought he was thinking until he realized he was screaming it: Make it all stop now!"

"The doctor looked around, then back, then at the bodies. 'use them.' "'The dead?' "'They won't feel it. You' - he pointed a bloody hand at Charley - 'give him help there. Pile them up to stop the wind from the side of the tent."'