People addicted to smokeless tobacco can develop thick, leathery white spots in the mouth. what are these spots called?

Does anyone have an answer to this question? if so me.

What should be changed to make the following sentence true? "the stress model suggests that people with a predisposition for a disorder are more likely to develop the disorder when faced with stress."

Traffic patterns refer to: how you move through a space hallways how rooms are connected to each other how rooms are organized