Use the following to answer question: 
-(Table: The Production Possibilities for Tractors and Crude Oil) Use Table: The Production Possibilities for Tractors and Crude Oil.In Mexico,the opportunity cost of producing 150,000 barrels of crude oil is _____ tractors.
Definitions:
Embolus
An embolism occurs when a foreign body like a blood clot, air bubble, fatty particles, or any other substance is transported by the bloodstream and becomes lodged in a vessel, blocking it.
Allergy
An immune system reaction to a foreign substance (allergen) that is not typically harmful to the body.
Blood Cells
Cells found in blood, including red blood cells (for oxygen transport), white blood cells (for immune defense), and platelets (for blood clotting).
Erythrocyte Destruction
The breakdown or hemolysis of red blood cells, which can lead to conditions such as anemia.
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