Which of the following was one of the key principles endorsed by the pre-raphaelite brotherhood?

the one that was one of the key principles endorsed by the pre-Raphaelite brotherhood was : Art requires rote learning of tradition and formula. To put it simply, art is an expression of how the artists see the world around of them. In the process of creating that perception, the culture and society that surround the artists will have a very big impact in shaping it

Here is a picture of a turtle, just an idea though

We need the picture to assist you with this question. (: