The correct answer is: "elasticity of supply"
The elasticity of supply measures the percentage change in the quantity supplied cause by a certain price variation. According to the law of supply, price and quantity supply are directly related hence, when price increases so does the quantity supplied.
When there is a % increase in the price of the product, if the quantity supplied increases in a larger proportion, then the supply curve is elastic. Meanwhile, if the % change in the quantity supplied is smaller than the price variation then the supply curve is inelastic.