Which statements about mound builder works are true?

Type of sculpture can move and change visual form

In 1907, the retrospective on the work of 19th century post-impressionist georges seurat influenced the development of cubism in a radical way through his painting titled, “sunday afternoon on the island of la grande jatte.” ? ?

Which does the author mean by " nature had to kindle all the fires, for man by his own effort was unable to produce a spark