The student's text closely resembles the source material in both structure and wording, making it a case of plagiarism. While the student has altered the phrasing slightly (e.g., changing "Anyone who has experienced firsthand" to "If you've seen" and omitting some details), the overall idea and specific phrasing remain largely intact.
Plagiarism involves using someone else's ideas, text, or work without proper attribution, and here, the student has taken a significant portion of the original text's concept and structure without crediting the author. To avoid plagiarism, the student should have either paraphrased the content significantly while attributing the idea to Jared Diamond or directly quoted the source with proper citation.