For 2002, because the change in GDP deflator is 0 it is the variable does not change;Because the GDP deflator measures the current level of prices relative to the level of
prices in the base year, so the other two variables do not change are the prices of Milk and Honey;
For 2003, because the real GDP2003 change compared to the preceding year is 0 so the real GDP 2003 is one of the variables that does not change;To obtain a measure of the amount produced that is not affected by changes in prices. we use real GDP, which is the production of goods and services valued at constant prices.So the quantity of milk and honey does not change in 2002 and 2003 and it is the other two variables do not change.