Answer:
1. tight drum programming.
2. lush disco-influenced string sounds.
3. slick production techniques.
4. lush vocal arrangements often with close harmonies.
5. hip-hop influences
Like paintings or something
The Mound Builders used metal tools, and were probably metal builders. Based on that information I would say the answer is B.Copper, because copper is a metal.
It was the first painting that showed a fully equipped domestic interior. (Apex)