A job, they left the countryside and migrated to cities and towns for new jobs.
I’m pretty sure they fought and conquered neighboring tribes. They also had Tenochtitlan, the capital, in the middle of lake Texcoco, which provided protection. They then defeated more tribes and taxed the tribes until the Aztecs were flourishing where they were invaded by Hernan Cortez
The name of the first satellite put into orbit by the United States is called Explore 1 and was put into orbit in January 31, 1958.
Pull factor means a factor that attracts someone towards something, so the answer would be these 3 options:
Political tolerance of religious minorities
Abundant and cheap land
Abundant factory work