The correct answer is Senate impeachment trial.
Veto is incorrect because a veto refers to a presidents ability to reject a law passed by Congress.
An executive order is incorrect because this refers to a presidents ability to make a law without the consent of Congress.
A House impeachment vote is incorrect, because the House can only decide whether or not the person can be put on trial for impeachment.
This shows that the only correct answer can be the Senate impeachment trial. In this trial, the Senate acts as judges to determine whether or not the president would be removed from office.
