Hi Sara, I found some pictures that can help you: 1. We normally find benches in parks and gardens. They are designed for more than one person to sit on. https://www.pexels.com/search/bench/ 2. We use chairs in houses, offices, restaurants. They are designed for only one person to sit on. https://unsplash.com/search/photos/chair 3. A seat is a part of a plane, train, car, cinema, stadium ect. or a piece of furniture (like benches, chairs and sofa) designed for people to sit on. We normally use the word seat in sentences like "Have a seat" or "My seat is 33C". I hope you have a better understanding of the difference in meaning. Try to google those words yourself to see pictures. Bye

I suggest doing an image search for each word. You'll understand that much more quickly and easily than any explanation. https://images.google.com.au/