Answer: a good with an elastic supply
Step-by-step explanation:
Price elasticity of supply simply refers to how the changes in market price of a good bring about a responsiveness to the supply of such good.
Based on the information given, the best description of the grass seed that is described in this scenario is that it's a good that has an elastic supply. This is because the price of the good in thus case, is sensitive to the changes in the price.