What is the economic theory given for the fall of the indus valley civilization? lack of resources devaluation of money falling behind technologically decline in trade

A decline in trade would be the answer.

The Indus Valley Civilization started to weaken around 1800 BCE. Archaeological evidence specifies that trade with Mesopotamia, situated mainly in modern Iraq, and appeared to have finished. The progressive drainage systems and baths of the abundant cities were constructed over or congested. Inscription started to vanish, and the consistent masses and measures used for trade and levies fell out of use.

- "schenck v. united states, case in which the u.s. supreme court ruled on march 3, 1919, that the freedom of speech protection afforded in the u.s. constitution's first amendment could be restricted if the words spoken or printed represented to society a “clear and present danger.” "

- speech aimed to potentially create danger could be banned.

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the correct answer is b