Which of the following materials is the poorest thermal conductor?

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.” ? ?

Look at flagellation of christ by piero della francesca. this painting is a primary example

Which type of lighting can visually separate the actor or object from its background and highlight the upper portion of the object or actor