Answer: B. demand
Demand describes the seller's ability and desire to sell goods and services.
Explanation:
Demand refers to the quantity of goods (products) and services which a consumer is willing and able to buy from a seller at a given price over a specific period of time. It is the purchasing power of a consumer to purchase a given product at a given price. An increase in the price of a product or service will cause a decrease in the quantity demanded while a decrease in the price of a product or service will cause an increase in the quantity demanded.