Which amendment pertains to the process of presidential succession?

The 25th Amendment is specifically designed to address issues related to presidential succession and disability. Ratified in 1967, it clarifies the procedures for what happens when a president is unable to perform the duties of the office, whether due to death, resignation, removal, or incapacitation. This amendment provides a clear line of succession by detailing the process for the vice president to assume the presidency and also allows for the appointment of a new vice president, thereby ensuring continuity of leadership in the federal government.

In contrast, other amendments listed do not deal with presidential succession. The 12th Amendment relates to the electoral process for the president and vice president, the 10th Amendment reserves powers not delegated to the federal government for the states, and the 20th Amendment outlines the terms of office for the president and congress, including when they start and end.