Bill is throwing a football at four targets and attempting to knock them over. which of the following targets will be hardest for him to knock over?

In this case, it will all came to the material of the target. The easiest one should be the one that is made by nylon target.
The hardest one to knock over would be made by materials such as silicone, which will basically provide strong deflection for the ball

hope this helps

What are the choices?