Answer: When the price level increases, real balances increase and businesses and households find themselves wealthier and therefore increase their spending.
Explanation:
As the price level falls, the interest rate declines, and interest-rate-sensitive spending increases. It should be noted that a low interest rate will bring about a rise in the demand for investment.
Therefore, when there's a reduction in the price level, there'll be a reduction in interest rate as well which then leads to the rise in demand for investment and rise in aggregate demand.
When the price level increases, there will be a reduction in real balances while the businesses and the households will be poorer when compared to a scenario whereby there's a price fall.