C. Fishing
I think fishing would make sense due to living in a river valley.
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One prominent form of government is the communist government, which is currently being used in countries such as China and North Korea.
Another type of government is the capitalist government, which is used by many global countries such as the United States, Russia, and South Korea.
These two governments really are a spectrum, because there can be some countries that are completely free market or that are completely communist. There are spots in between such as socialism.
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<span>The correct answer is (D), sheep. Didgeridoos and boomerangs are artifacts invented by humans in Australia. Koalas evolved in Australia, and to this day are only found in the wild in Australia. In contrast, sheep were first domesticated in ancient Mesopotamia and then brought by humans to other parts of the world. The first sheep were brought to Australia by ship, from the Cape of Good Hope in 1788.</span>
Acid - an acid is a chemical species that donates protons for hydrogen ions and or excepts electrons. Most as it’s contain hydrogen atom bonded that can release (dissociate) to yield the cation and anion and water.