Enslave the Natives. That is a big one.
The process by which businesses or other organizations develop international influence or start operating on an international scale.
"Both civilizations sprang up <span>in locations with water sources" would be the best option from the list, since water during this time was crucial for the development of civilization. </span>
The correct answer is "political leaders", or other elitist groups who lead a revolution including the population which they dominate.
