Answer:
learning what ypu was taught in school!
<span>Some do and some do not. One cannot always isolate all of the variables, which may only allow a conclusion of correlation (coexistence), which is not the same as cause and effect. If one can observe that a condition only exists following some other condition, to the exclusion of all other potential causes, then cause and effect can be established.
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~Witt
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The area referred to today as Southeast Asia was at one time
2)The Mongol Empire
Your teacher may be looking for something more specific than this. But, now the idea of evolution is generally accepted and now with modern technology we can mostly prove his theory. (it isnt proven as it is a theory).