#1 which of the following is an example of a successful amendment? changing the number of supreme court…

Brief Explanations:

Lowering the voting age to 18 is a well - known and successful amendment in many countries, expanding the democratic franchise. Requiring judges to stand for election is controversial and not always a successful change as it can undermine judicial independence. Giving states power to declare war goes against the typical structure of a nation - state where such power is usually held at the federal level. Changing the number of Supreme Court justices is also a complex and often politically charged issue that may not always be a straightforward or successful amendment.

Answer:

Lowering the voting age to 18