The correct answer is <span>They developed math and astronomy to support their religious beliefs.
They used math and astrology to develop calendars that fit their religious beliefs and these were highly advanced for the time and considering their available technology. Based on this they made the famous calendar that predicted the end of the world in 2012.</span>
<span>The Maya developed math and astronomy, which they used to validate their religious beliefs.In fact, their religion was influenced based on their society, creating complex mathematical calculations, developing a writing system and even studying the stars in order to support their teachings. They assigned a Day God for each step of the week, using their understanding of astronomy, the calendar and math to comprehend their Gods.</span>
I think they had in common to develope their populations and "cities" (at their time there aren't real city like nowadays) near the rivers. Also both they had access to good fertile soils
