Answer:
Inferior good
Explanation:
Inferior goods are those type or the kind of goods whose demand falls or decline when the income of the person or customer or individual rises or increases.
In short, the demand of the inferior goods is related inversely to the customer or person income.
So, in this case, the person bought 10 frozen pizzas per month, but when the person start earning, then the person would not buy the frozen pizzas. The frozen pizza will be inferior good for the person as the income of the person will rise.