The price of a complementary good changes. Demand shifts Movement along demand Incomes in the economy change; the good is a normal good. Demand shifts Movement along demand Incomes in the economy change; the good is an inferior good. Movement along demand Demand shifts The price of the good itself increases. Demand shifts Movement along demand The price of a substitute good changes.

NOTE: Your question isn't clear, Johnson. Would you mind checking it and writing it in a way you can be better helped?

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Answer and Explanation:

Two goods are said to be complementary goods if an increase in the price of a particular one leads to a commensurate decrease in the demand that buyers placed for the other one.

A good is said to be a normal good if the reason for an increase in demand is due to an increase in the income of the buyers.

A good is said to be an inferior good if there is a decrease in demand even though the buyers have experienced increase in their income.

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