Given the task definition, example input & output, solve the new input case.
In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Example: The Inheritance Cycle is a series of fantasy books written by Christopher Paolini.
Output: The Inheritance Cycle is a tetralogy of young adult high fantasy novels written by American author Christopher Paolini.
The output sentence elaborates on the input sentence without changing its general meaning e.g. "tetralogy of young adult high fantasy novels".

New input case for you: Marginal utility is a concept from economics that describes the change in utility from consuming more or less of a good or service .
Output:
In economics , utility is the satisfaction or benefit derived by consuming a product ; thus the marginal utility of a goods or service is the change in the utility from an increase in the consumption of that good or service .