Peter paul rubens was one of the most outstanding
The image above shows a turtle. The purpose really depends. It could be showing slowness.
The correct answer is {B. Art Criticism}. Art criticism is used mainly for judging <span>works of art based on the elements of art and the principles of design, a work's historical context, and our own opinion.</span>
I know it is too late, but C. Rock Paintings, is the correct answer :)
This is called a "topic sentence." It's common for paragraphs to have the main idea be the first sentence, because this allows the author to set up the rest of the paragraph and explain things immediately after the topic sentence.