(1) in a lower proportion Explanation: According to the Keynesian Consumption theory, "men are disposed, as a rule and on average, to increase their consumption as their income increases, but not by as much as the increase in their income." Another feature of consumer behavior is that when income increases, people do not spend their entire incremental income on consumption. They save a part of it for their financial security during the period of =employment, illness, etc. In simple words, the marginal propensity to consume decreases, i.e., house-holds spend a decreasing proportion of marginal income on consumption.