The student’s text isn’t exactly plagiarized, but it is really similar to the original source. They used almost the same idea without changing the wording much. The student says, "If you've seen the ancient paintings in France's Lascaux Cave," which is a bit different from the source’s "Anyone who has experienced firsthand," but it still keeps the same main point.
To avoid plagiarism, the student should try to put the idea into their own words more and maybe add some extra details or thoughts. It’s important to make it sound different and show that they really understand what the source is saying!