Which material did mound builders use to make portrait plaques?

In the above painting by salvador dalí, entitled persistence of memory, which of the following objects do not occupy positive space? a. the clocks c. the tree trunk b. the ground d. the cliff select the best answer from the choices provided

What animal should i do for my clay project? give me some good worth 20 points!

Describe the various work performed by multimedia artists, the creative experiences individual studio employees bring to their work, digital equipment they frequently use, as well as professional opportunities outside of a full-service multimedia studio they recommend for those just starting their careers in the field.