How does Margaret Peterson Haddix use imagery in Running Out of Time?

Imagery:

"Jessie had never heard of women wearing pants. But these trousers were so odd that Jessie began to believe the world outside Clifton truly was different. She trembled, afraid. Before, she could have believed that Ma was making up the whole story."

"All three girls had hair as wild as Jessie's, and Jessie grinned. Her hair fit in without her having to do a thing with it! For the first time she could remember, she could get up in the morning without braiding her hair."