1. B
2. A
3. B
4. B
5. The Kaplans support their claim about the positive effects of nature by testing the claim using pictues, showing the postive effects of nature on sick patients, and by showing the postive effects of nature on people living normal lives. ABC News states" In the years since, they have repeated that study dozens of times, all over the world, with the same results." The Kaplans redid the study over and over in all over the world to prove that their claim is correct. Paragraph 24 says"In a series of studies, the couple demonstrated that an office window that overlooks a natural scene helps people relax, thus fighting off one of the primary threats to competence, mental fatigue." The couple intensively supports their claim in more than one study to show the positive effects of nature on people. All of these studies and reasearch provide more than enoguh foundation to support Kaplan's claim.