It's A
Irrigation was overused, the soil didn't get any rest (crop rotation is a younger invention), the result was salinization of the soil, which led to decline of Sumer.
Answer:
hecks and Balances. ... With checks and balances, each of the three branches of government can limit the powers of the others. This way, no one branch is too powerful. Each branch “checks” the powers of the other branches to make sure that the power is balanced between them.
Explanation:
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B) The US's declaration of war against spain in 1898
Answer:
Unlike the largely negative liberties added to the U.S. Constitution in Bill of Rights ("Congress shall make no law..."), the Texas Constitution asserts the rights of citizens at the outset in Article 1. With its more positive tone the Texas Bill of Rights provides much the same protections as the U.S. Bill of Rights.
Explanation: