Bike
cats and dog
the aztects grew crops and sacrificed people
Monkeys and birds
I believe it was the Spanish
Mexico city
for unknown reasons!
Earthquake, not enough crops, invaders killed the cities, and people might have just abandoned the cities.
the Aztecs come from Mexico
hobos
There is no such word as "Aztects". If you are asking about Aztecs, their civilization collapsed in the 16th Century, but they are still alive today. Most modern Mexicans descend from Aztecs.
They abandoned their cities, their communities, and their countries. Thus, this created abandoned strips of land, as well as ghost towns. This created havoc for their local economies.