Answer:
The people migrated because they were always searching for food like fruit and vegetables, and they were always following game that they would hunt. The climate was changing and getting warmer, Vegetation was changing and people where finding out how to grow crop. They moved to an area that was perfect to grow crops and hunt. The area and the climate gave people a lot of choices.
Explanation:
Answer:
D.
Explanation:
Some Texan soldiers never crossed the Mississippi River because they had to defend the ports near Texas coast. Texas coast was important site for receiving supplies.
The Texans knew that the port is the most vulnerable area in the war, so they tightened the forces there. The ports were defended by the Texan soldiers who did not crossed the river.
Therefore, option D is correct.
The correct answer is - trade.
The Sumerians engaged in trade with their move of exchanging their surplus food for materials like the copper that they needed to develop their weapons and thus their army forces. This was a very smart move from their side because they managed to use the resource they had in abundance but was scarce in the other surrounding areas so that they take what they need to become stronger and pretty much defend more efficiently from the same people they were engaging in trade with.
To sail across the Atlantic Ocean to Asia
