The answer of this questions is D
Cahokia was one of the largest and possibly the capital city of the people that are referred to as the Mound Builders. Cahokia's size and the large number of people that lived there led to the main issues. Bad droughts and poor harvests meant people couldn't eat.
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What is the snowball effect in psychology? The Snowball effect is a long-term process that starts from an initial state of minor differences and builds upon itself, just like a snowball rolling down the hill, becomes larger and larger.
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