One popular one is 'The Little Prince' which was inspired by the author's own experiences and observations. It tells a profound story about friendship, love, and the nature of humanity through the eyes of a little prince from another planet.
It's hard to say for sure. Sometimes pictures can be staged or fictionalized, so we can't always assume it's a true story just by looking at a girl in a picture.
Well, to determine if the girl in the picture is part of a true story, we'd need more information. Maybe there's a caption or some background details that could give us a clue, but without that, it's a mystery.
They can be used as a vivid teaching tool. For example, when teaching history, a picture book based on a true historical event can make the dry facts more interesting. Students can better visualize the time, the people, and the situation.