Powers not delegated to the U.S by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.
So basically, they are reserved to the states and left up to them to decide.
It is important to limit a government's power because, unchecked, a government can impose laws
It helped tham grow plants and it was believed to be a place that the gods loved.
hope this helps you and can i get brainlist