Answer:
Delegates gave the continential congress, the power to request money from the states make appropriations, regulate the armed forces, appoint civil servants, and declare war.
No one knows the true reason for the mysterious decline and fall of the Mayan civilization but many believe that it was because the Maya had exhausted their environment and surroundings to the point that it couldn't sustain a large population anymore. This would have caused all the Maya to abandon their cites or die off. Again this is just a popular theory of scholars but the answer is that no one really knows. All that is for sure known is that the Classic cites were soon abandoned and the Maya region collapsed. Hoped this helped.