Which condition may result in a collapsed lung?

Which action is characterized of mental illness 1.brushing teeth every hour because ones mouth feels dirty ? 2. forgetting to eat breakfast on a busy day? 3.crying three days over a relationship breakup? 4.feeling embarrassed about going to school after failing in front of friends?

Who is considered the father of modern behavioralism? a fred b jung simmer pavlov

The body uses fight or flight as a way of defending itself from stress. question 2 options: true false