When people in a market economy specialize, what do they depend on to make sure their needs are addressed?

Voluntary exchange

Explanation:

The question is case of Voluntary exchange

Voluntary exchange depends on shoppers and makers acting to their greatest advantage. A willful trade between a buyer and a maker improves the two parts and leaves them better than they were before the trade.Additionally, exchanges are made such that both the purchaser and the dealer are in an ideal situation after the trade than before it happened.

introduction of a drug directly into the respiratory tract is a form of inhalation administration.