Explanation:

- Governor: The Governor holds office during the pleasure of the President. This means they can be removed by the President at any time without any specific reason.

- Election Commissioner: Once appointed, they cannot be removed from office easily. They have a fixed tenure and can be removed only through a process similar to a Supreme Court judge.

- Speaker of Lok Sabha: The Speaker is elected by Lok Sabha members. Their term lasts until the Lok Sabha dissolves or they resign. They do not hold office at the President's pleasure.

- Prime Minister: They hold office during the confidence of Lok Sabha, not at the President's pleasure. They must resign if they lose the Lok Sabha's confidence.