Saving is the portion of DISPOSABLE INCOME THAT IS NOT CONSUMED.
The answer is "a. disposable income that is not consumed" since we, as consumers, keep a portion or percentage of our additional income for saving. The money that is not used is considered disposable income.
You might not realize it, but the economy as a whole is significantly impacted by our decisions to keep a portion of our disposable income that is not consumed or to spend money.
Marginal propensity to save and consume has an impact on expenditures and tax multipliers. Both of these marginal propensities are ultimately used to discuss how a household ends up making use of its extra money, whether it is saved or expended.
More on disposable income here: https://brainly.com/question/28017673
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