What are the advantages of a group (congress) vs. an individual (president) when it comes to setting policies? what does the supreme court do?

The US Congress consists of 2 houses. The House of Representatives, with its 435 members and The Senate, with its 100 members.

In a decision-making process, it is always better to have more participants that could help come up with a better proposal or solution to a certain issue. When it comes to policymaking, having an organized group of individuals who will debate over the country's matters will offer you a greater probability of coming up with better policies in comparison to one single person. The President does have a group of advisors but in the end, it is only he or she which has the last word.

The Supreme Court has the power of Judicial Review. This means that it can invalidate a law that is passed by a Congress by the argument that it goes against a part of The Constitution. It can also invalidate an executive act from the President by considering it to be unlawful.

one way archaeology us understand the past is through the material objects it finds, allowing us to know what was being used, and when. for example a dig recently found a flute, believed to be the oldest musical instrument found to date.

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i am confused, what is the question? i can you out if you put it into more depth.