Main Idea

“Read this: "My cat loves to sleep in sunny spots. He purrs very loudly when I pet him. He also likes to chase string." What is the main idea of this passage? Read this: "The school bus was late today. Many students missed the first bell. Everyone was worried they would get in trouble." What is the main idea of this passage? Read this: "I went to the park with my dog. We played fetch with a frisbee. He ran very fast and caught it every time." What is the main idea of this passage?”