To answer your question, I would need to see the content of paragraph 4 from the article you're referencing. However, based on the options provided, the correct response would depend on the specific content of that paragraph.
If paragraph 4 includes specific facts or statistics that support the main argument, then the response "It provides facts or statistics that help prove the central claim." would be appropriate.
If it elaborates on the implications of studies discussed, then "It gives further detail about how the studies will help humans." would be better.
For a nuanced restatement of the central idea, you would choose "It restates the central idea with a change in nuance after presenting data."
If it provides crucial context or background, then "It explains important background information that will help readers understand the central idea." would be correct.
Please let me know the content of paragraph 4 for more accurate assistance!