Question

what does elasticity measure in economics?
○ how the amount of a good changes when the producer hires more employees
○ how the amount of a good changes when the producer uses new materials
○ how the amount of a good changes when its price goes up or down
○ how the amount of a good changes when its distribution expands

Explanation:

In economics, elasticity (specifically price elasticity of demand or supply) measures the responsiveness of the quantity demanded or supplied of a good to a change in its price. The first option relates to production with more employees (likely about production function/labor input), the second to new materials (input change in production), and the fourth to distribution expansion (market reach), none of which define elasticity. Only the option about price change affecting quantity matches the concept of elasticity.

Answer:

C. how the amount of a good changes when its price goes up or down