Which amendment outlines the process for presidential succession?

The process for presidential succession is definitively outlined in the 25th Amendment. This amendment addresses what should happen in cases where a president is unable to fulfill their duties due to death, resignation, removal from office, or incapacitation. Specifically, it clarifies the procedures for the transfer of power to the vice president, among other provisions regarding presidential incapacity.

In contrast, the 22nd Amendment deals with presidential term limits, stating that no person can be elected to the office of President more than twice. The 19th Amendment is focused on women's suffrage, granting women the right to vote, and the 16th Amendment allows Congress to levy an income tax. None of these amendments concern the process of succession to the presidency, which is why they are not relevant to this particular question.