What was the most important effect of an increase of wealth in ancient civilizations?

Greater wealth meant ancient civilizations could devote more people, materials, and resources to projects beyond producing basic necessities. This made large construction—such as temples, monuments, and public works—possible. Bartering and writing existed for other reasons, and considering opportunity cost is not the most important effect described here. The best answer is D, people were able to pursue large building projects.

AI-written and checked against the verified answer.