Answer:
Hi ! What question do you have to answer ?
The answer is B.
Wegener could not explain how similar fossils could be found on different continents.
The first event that took place out of these options was the Spanish Conquest that destroyed the Aztec Civilization which was in 1519. Therefore the correct sequence is 3,1,2,4.
The correct answer is D, domestication of animals. All other alternatives refer to events that only happened later.
In order to affirm an Agricultural Revolution ocurred, historians have to choose the most important changes and events that determine that from that moment onwards life was different.
The most important thing that supports the idea of an Agricultural Revolution is that humans started to domesticate plants and animals, which made possible for them to settle and stop being nomads.
This lead to the birth of cities and to radically change how those people lived.