How does Catherine Marshall use imagery in Christy?

Examples of Imagery:

"Certainly there had never been such a setting for a major operation: the wind whistling around a mountain cabin; dirty pots and pans by the hearth; a baby crying in its mother's arms; the smell of chewing tobacco; all these people crowded into one room with the air getting fouler by the minute. It would be germ-laden. Surely the Doctor was going to ask these staring people to leave."

"The adults, hanging onto hatred in the name of virtue, were reaping a bitter harvest in their children."

"And that was why David had a valid point about the 'Black Betty.' Everyone in Cutter Gap knew that it was on occasions like this that the potent whiskey unlocked old grudges. Tempers usually flared, knives, and guns might be whipped out. Fights and eye-gougings, knifings, and shooting—celebrations all too often ended in tragedy."