Which of these statements describes what the diagram is showing

Me with this psychology homework, i’m struggling with it.

How does the principle of federalism affect the u. s. government? a. it guarantees that the united states will always be a representative democracy b. it ensures that the state governments have greater authority that the federal government c. it creates both separate and overlapping powers for the federal and state governments d. it divides the federal and state governments into three branches

From where do ocean waves obtain their energy