Final answer:
Ancient American civilizations developed along coastal areas due to availability of resources, transportation and trade routes, access to water, and milder climates.
Step-by-step explanation:
Ancient American civilizations developed along coastal areas for several reasons. One reason is the abundance of natural resources that coastal areas provide, such as fish and shellfish for food, and wood and stone for building materials. Coastal areas also offered easier transportation and trade routes, as well as access to water for agriculture. Lastly, coastal areas often have milder climates compared to inland regions, making them more conducive to large-scale agriculture and settlement.
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