The correct answer to this open question is the following.
The founders created multiple parts of the government so as not to give anyone too much power.
What is the role of each of the three branches of government?
The role of each branch of the federal government is the following.
Executive branch. It is the President of the United States and the members of his cabinet. The President is the leader of the nation, the chief diplomat, the commander-in-chief, and oversees the cabinet comprised of departments such as the State Department, the Treasury, Department of Education, and many more.
The Legislative branch is the US Congress divided into two chambers. A lower chamber or House of Representatives and an upper chamber or Senate. They create the laws.
The Judicial branch. It is the United States Supreme Court. The most important court in the nation.
How might they check each other's power?
Each branch has enough power but none has more power over the other. It is the way the founding fathers knew there could exist a balance of power in the federal government. The President can veto a law sent by Congress. The US Congress can impeach the US President. And the Supreme Court can declare a law created by Congress, unconstitutional.
