Which statement about the mound builders is true?
1. the mound builders' did not produce their own food.
2. the mound builders lived in rural communities.
3. the mound builders had slaves.
4. the mounds were not used as platforms for temples.

The correct answer is 1

Explanation:

The mound builders did not produce their own food. They commonly feed themselves from fish, deer and as well as available plants near their living area.

They did not have slaves and nither lived in rural communities. They lived in fortified towns with lofty mounds and plazas. And finally these mounds were mostly served as platform for temples.

 The CORRECT answer is, 3. "The mound builders had slaves"

Explanation: I took the K-12 Quiz and that was the right answer. Hope this helps have a good day! :))