What did the easy access to water make simpler for the the river valley civilizations

Made it more suitable for civilization to strive

The Fourth Amendment protects your privacy from say FBI surveillance, unlawful arrests, and many other things like that. You can find more information here: https://www.law.cornell.edu/constitution/fourth_amendment

The Fifth Amendment basically protects your right of speech if I am not mistaken. You could be in a courtroom, and a lawyer could ask you a question but you wouldn't necessarily have to answer because of your right to exercise the Fifth Amendment. You can find more information here: https://www.law.cornell.edu/constitution/fifth_amendment

Let me know if this helps. :D