text: Venus has many challenges and dangerous characteristics, too dangerous for humans to travel and explore. Venus has a thick atmosphere of almost 97 percent carbon dioxide blankets, and clouds of "highly corrosive sulfuric acid." The author states all these facts about Venus, and all of them describe a planet that is too dangerous to be explored. The author is not "supporting" his idea when stating these things, but he does support it when he states that Venus is the most "Earth-like planet in our solar system," because he is trying to get readers excited about exploring Venus. The author does not say these ideas enough for readers to find visiting Venus worthy.