Select all the correct answers. The Mesoamericans developed which inventions or technologies?
selective breeding
quern
fire
the number zero
rudders

Which factor best suggests a cause for the urban problems shown in this table? (3 points) increasing discriminatory housing practices shifting population density gradients over time declining urban renewal efforts by city governments declining basic employment sector in industrial cities increasing gentrification efforts in the inner cities

During the cold war, the united states was involved in certain regional conflicts due to fears later called the domino theory, which stated which concept?

By july of 1950 north korean forces had pushed south korean forces as far south as