Given the question: Answer the following question given this paragraph: Clouds on Earth are made of water vapor. Venus's clouds are a lot less pleasant. They are made of carbon dioxide, sulfur dioxide, and large amounts of corrosive sulfuric acid! Scientists think the color of sunlight on Venus is reddish-brown. Q: What are clouds on earth made of? Choices: - rain - ozone - carbon dioxide gas - water vapor A:
The answer is:
water vapor