Let's think about what we know about the sun. It's in our solar system, which is very far away. When we look up into the skye during the day, we can normally see the sun, and it's a circle, which means it's round. Also, the sun produces heat so it's very warm. Because of these details, the best answer is the group of words that contain "round", "bright", and "hot"".

Let's think about what we know about sweaters. We usually wear them when it's cold outside to keep up warm and most of the clothes that we wear are soft and comfortable. Why would we wear something that wasn't comfortable? Because of these details, the best answer is the group of words that contain "warm", "soft", and "comfortable".