1) What is a toothbrush, and why do humans use it? 2) Why do humans carry little rectangles everywhere? 3) What is the purpose of a refrigerator? 4) Why do humans wear clothes? 5) Why do people say “thank you” when they receive something? 6) Why do humans use cars instead of walking everywhere? 7) Why do humans work every day instead of just relaxing? 8) What is a joke, and why do humans laugh at some things but not others?

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