<span>Congress has the power to introduce and pass laws. The president has the responsibility of enforcing all federal laws. This is an example of separation of powers. In every democratic form of government, powers are divided to the three branches of government: executive, legislative, and judicial. </span>
I believe 3 is the answer, because I think the U.S bought a part of Mexico.
Answer:
Around 1.8 million years ago, Homo erectus migrated out of Africa via the Levantine corridor and Horn of Africa to Eurasia. This migration has been proposed as being related to the operation of the Saharan pump, around 1.9 million years ago.
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