How did the environments impact the cliff dwellers and mound builders

What does one prolonged blast and one short blast mean?

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

According to the theory of mercantilism, a country is strengthen by