A 42-year-old male presents to the emergency department following a motor vehicle collision with severe dyspnea, tachypnea (RR 32/min), tachycardia (HR 128/min), hypotension (BP 88/54 mmHg), and jugular venous distension. On examination, the right hemithorax is hyperresonant with absent breath sounds. A chest X-ray obtained after initial stabilization shows the finding marked **B** in the diagram. Which of the following best explains the pathophysiology of this radiographic finding?
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