Answer:
d, a?, c or e, b?
Explanation:
i tried my best, i hope they are right
The voyages of Christopher Columbus led to the first lasting European contact with the Americas, inaugurating a period of European exploration, conquest, and colonization that lasted for several centuries. Columbus was not the first European explorer to reach the Americas having been preceded by the Norse expedition led by Leif Erikson in the 11th century. Leif Erikson was an Icelandic explorer considered by some as the first European to land in North America (excluding Greenland), before Columbus. There is much debate as some say that many different people, spanning centuries, set foot on the New World (as the Americas were called) before Columbus, and, of course, the ancestors of the Native Americans had already discovered it many years before.
I need a story or something to understand
A. The Aztec and Inca had large, united empires, but the Maya did not. <span>The Mayan region was divided into several independent city-states, some of which became powerful. A king ruled each city-state and served as the head of the government, military, and religion. Each king had a court of followers and was advised by a council. To avoid war, kings often acted as diplomats as they formed alliances with other
city-states. However, diplomacy often failed and, as a result, war between city-states was common. The city-state structure of the Maya prevented them from uniting into an empire.</span>
It was that "Flat land with poor drainage led to salinization from irrigation waters," that was a factor in the decline of Sumer, since this led to a build up of salt in the soil, which greatly reduced agricultural output.
