Answer:
- Swimming lessons are great source of exercise and an essential life skill.
- Swimming lessons provides benefits to people of all age.
- Swimming lessons are enjoyable in the summer.
Step-by-step explanation:
Main Idea includes the overall message of the text that a writer intends to convey to the audience.
Swimming lessons in this case would be the main idea if it was the overall message of a literary work.
Examples of this theme (main idea) in a sentence would be:
- Swimming lessons are great source of exercise and an essential life skill.
- Swimming lessons provides benefits to people of all age.
- Swimming lessons are enjoyable in the summer.