Who is the singer of " Cardigan"? (I know the answer, just testing yall!)

What types of visual art mediums are heavily based on observation?

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.” ? ?

This medium typically is made of graphite, a crystalline form of carbon: