1.
what concept is described by the phrase "each branch of the government has different duties"?
federalism
executive orders
checks and balances
separation of powers
2.
the power to declare a law “unconstitutional” is given to the branch.
executive
judicial
legislative
3.
the branch has the power to impeach federal judges.
executive
judicial
legislative

1. Separation of Powers

2. Judicial

3. Legislative

Explanation:

Separation of Powers- This is a concept entrenched in the constitution of a democratic sovereign state which calls for the division of duties among three distinct arms of government established for that purpose. Which are the legislative, the executive, and the judiciary. the main trust of this doctrine is that each arm of government is independent of the other and performs distinct function despite their cohesion. This doctrine was popularized by a French philosopher Baron de Montesquieu.

Judicial -  In consonance with the doctrine of separation of powers, the judiciary via the federal court is empowered by the constitution to interpret the letters and spirit of the law and in line with the power conferred on it by the constitution declare a law unconstitutional especially if it is repugnance to natural justice, equity and good conscience.

Legislative - The power to impeach federal judges is vested in the legislative arm of government, The Senate particularly has the final power to remove a  Federal judge after the House of Representatives  has impeached the judge.

answer:

c

explanation: