Use the following to answer question: 
-(Figure: A Market in Equilibrium) Look at the figure A Market in Equilibrium.At the equilibrium price,this market's consumer surplus is equal to the area:
Definitions:
Ventilation
The process of moving air in and out of the lungs to facilitate gas exchange with the internal environment, particularly to remove carbon dioxide and bring in oxygen.
Thoracic Cavity
An anatomical space located within the chest, bounded by the ribs, sternum, and diaphragm, housing the lungs and heart.
Alveoli
Tiny air sacs in the lungs where gas exchange between the air and blood takes place.
Pulmonary Fibrosis
A lung disease that occurs when lung tissue becomes damaged and scarred, which can severely hamper respiratory function.
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