Question

What is judicial review?

a decision about which cases go to the Supreme Court
the power to determine if an act is constitutional
the system by which the Constitution is reviewed
a review of acts that have been allowed by Congress

Answer 1

the power to determine if an act is constitutional

Answer 2

Option 2: the power to determine if an act is constitutional.

Judicial review is the Supreme Court's right and power to review laws (in the local, state and federal level) and acts of the executive and legislative branches and determine whether they are constitutional or not. This way, the Judicial branch ensures that the other two branches don't abuse from their power.