The best descriptions of the framework for the Constitution from the options provided are:
- A system of checks and balances is designed to prevent abuse of power.
- The separation of powers ensures that no one branch has too much power.
These two points accurately reflect key principles of the U.S. Constitution that ensure the distribution and limitation of governmental power.
The other options regarding the four branches and powers not mentioned belonging to the federal government are not correct. There are three branches of government (executive, legislative, and judicial), and powers not explicitly granted to the federal government are typically understood to belong to the states or the people, as outlined in the Tenth Amendment.