What are some factors that led to an explosion of the aztec population?

Is the idea of containment relevant to american forge and policy today why or why not

What were the terms behind germany's surrender during wwi?

Ineed asap! ! what is the name of the system in which each branch of the u.s government can limit the actions of the other branches? a. perpetual union b. division of powers c. cooperative federalism d. checks and balances