Final answer:
The quantity of a good or service that manufacturers or owners are willing to sell at different prices during a specific time period is known as supply.
Step-by-step explanation:
The correct answer is a) Supply. The quantity of a good or service that manufacturers or owners are willing to sell at different prices during a specific time period is known as supply. The supply curve shows the relationship between price and the quantity supplied of a good or service. When the price of a good or service increases, suppliers are usually willing to produce and sell more of it, resulting in an upward-sloping supply curve.