Question

The concept of demand is best described as the quantity of a good or a service that people will offer for sale at different possible prices. the additional satisfaction derived from a quantity of goods and services obtained when income increases. the total satisfaction that consuming a good provides people at different prices. the quantity of a good or service that consumers will substitute when the price of a good changes.

Answer 1

the quantity of a good or a service that people are willing and able to purchase at different possible prices.

Step-by-step explanation:

The demand concept would be refer to the various quantity amount in which the people are willing and able to buy at various prices so the demand concept deals with the goods or service quantity in which the purchaser would purchase at various prices that can be possible

Hence, the above represent the answer