How can overcrowding contribute to the collapse of a civilization?

Question

How can overcrowding contribute to the collapse of a civilization?

The more people you have the more resources/food is necessary to keep them alive you have more people then resources/food they civilization will collapse, because its over populating the area more than the civilization can supply.

Food and other resources can become scarce.

Explanation:

If more people came to a civilization, food and resources and space can become scarce.  The lack of space and housing can cause a faster spread of disease, causing the end of a civilization.

answer: (fluidity)is the correct answer.

explanation: because of this characteristic, success on the battlefield depends in large part on the ability to adapt to proactively change events to our advantage as well as to react quickly to constantly changing conditions

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;