Answer:
Income effect is the correct answer.
Step-by-step explanation:
The income effect means that the change in demand for a good or service which is caused by the change in a consumer's purchasing power resulting from the change in real income. The change can be due to a rise in the wage or due to freeing the income due to a decrease in the price of the goods. This effect also tells how the change in the price of goods will cause a change in its demand accordingly. The income effect is part of the consumer choice theory. It expresses the impact of change in income and relative market prices on the consumption pattern of goods and services.