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Multiple causation is the mutual effect by many different forces to cause a particular human action.
900 million, or about 13 percent of the world's population
Oceans and deep rivers form natural boundaries because they restrict human and animal migration.
During the last ice age.
Multiple causation
French influence
Areas that had been covered tended to industrialize earlier.
The communication networks and the language spoken.
The Line of Demarcation under the Treaty Of Tordesillas (1494) limited Portugal to colonies only in extreme eastern South America, which grew into the country of Brazil.
Missouri River
Democratic
France.
They are similar because they are both very big countries, and have great air and nature, tourist attractions, beautiful scenery, lots of tourist attractions and landscape.
The Nile, Amazon, and Mississippi. It is also the Missouri. :)
20,00 years.
Asians
