What was "proving up"? following the rules to secure ownership of a land claim
providing a certificate of marriage to receive 640 acres of land
Providing proof to the claims office for land
registering with the government to receive a land claim

the answer is typhoon

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