Answer:
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The two factors that led to latin american revolutions are:
<span> - the successful French Revolution, which popularize the democratic system and diminish monarch's influences all across the world.
- the invasion of Spain by the French, which avert the Spanish attention from the south America and create a lot of opportunities for the revolution effort in Latin America.
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<span>They moved with the changing seasons to get food and water for their animals. Their animals provided milk, meat and skins for the nomads.</span>
Observational studies study patients without manipulating or intervening during the research. They are used in research to help formulate new hypotheses or <em>theories</em> to be tested in further controlled experiments. This often leads to new information and facilitates the development of new <em>research</em>.