What is the important back story of rikki tikki tavi i have read the story just

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.” ? ?

One art critic referred to painters in the fauvism movement as "wild beasts". where did that title come from? what were some of the characteristics of fauvism?

What does bts stand for? what is the importance of bts? who first started it?