Question

the economic policy that made manufacturing more efficient by allowing for the easy replacement and mass production of components was known as...
capitalism
salutary neglect
free market system
interchangeable parts

Explanation:

The question is about identifying the economic/industrial concept related to efficient manufacturing via easy replacement and mass production of components. "Interchangeable Parts" is the concept that enabled this, as it allowed parts to be mass - produced and easily replaced, improving manufacturing efficiency. Capitalism is an economic system, Salutary Neglect was a colonial policy, and Free Market System is about market - driven exchange; none match the description as well as Interchangeable Parts.

Answer:

Interchangeable Parts