The definition of output effect is  revenue that results from selling additional units of a good or service. Thus the correct option is last.
A definition of any word is a detailed description defining the accurate meaning to the reader in order to gain information and understand the meaning to utilize in vocabulary and used in any sentence.
The term "output effect" refers to the impact that an increase in output has on the consumption of a specific input while keeping input costs constant. The labor demand change, an input in the production process brought on by changes in demand, is related to the output effect.
Therefore, option last is appropriate.
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