How does Andre Dubus use imagery in The Fat Girl?

Examples of Imagery:

“For days her relatives and acquaintances congratulated her, and the applause in their eyes lasted the entire summer, and she loved their eyes, and swim in the country club pool, the first time she had done this since she was a child”. (Dubus, 172)

“... during her afternoon classes, she was nervous and tense, and she chewed her pencil and tapped her heels on the floor and tightened her calves” (Dubus 169).