What of the following indicates the line of succession after the vice president?

The line of succession after the Vice President is indicated by the Presidential Succession Act of 1947, which establishes the order of officials who would assume the presidency in case of vacancy. Following the Vice President, the next in line is the Speaker of the House, then the President pro tempore of the Senate, and subsequently, the members of the Cabinet in the order their departments were created. This ensures a clear protocol for leadership continuity.