Use the following to answer questions .
Exhibit: Aggregate Production Function 
-(Exhibit: Aggregate Production Function) In drawing the aggregate production function, which of the following variables is not held constant?
Definitions:
Metabolism
The set of life-sustaining chemical reactions in organisms that allows them to grow, reproduce, maintain their structures, and respond to their environments.
Growth
The process of increasing in size, number, value, or strength.
Antecubital Region
The area of the arm located at the front of the elbow where veins are commonly accessed for blood drawing.
Elbow
The joint connecting the forearm to the upper arm, allowing for bending and extending motions of the arm.
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