3. Is denying people the ability to become educated an important factor in keeping a group of people oppressed?

Definitely.

Explanation:

If a  group of people are uneducated then it means they are illiterate. They can neither read or write. It's much easier to keep people in the dark if they don't know how to read or write. It is a form of oppression in another form.

legislative branch:

one of the three branches of government divided between the senate and the house of representatives.

- creates or makes laws

- power to override a veto

executive branch:

one of the three branches of government, headed by the president.

- enforces or carries out laws

- power to veto a bill sent to it by congress

judicial branch:

one of the three branches of government, headed by the chief justice of the supreme court.

- interprets laws

- power to declare laws or actions by the government unconstitutional

your answer is a hope this