Final answer:
The 25th Amendment made changes to the process of presidential succession and clarified the order of succession. It also allowed the President to appoint a new Vice President if the Vice Presidency becomes vacant.
Step-by-step explanation:
The 25th Amendment, which was ratified in 1967, made several changes to the original text. The amendment clarified the process for presidential succession in case of vacancies or disabilities. It established the order of succession, stating that the Vice President becomes the President if the office becomes vacant. Additionally, if the Vice Presidency becomes vacant, the President can appoint a new Vice President, subject to approval by both the Senate and the House.