Realism in visual arts is when artists try to make their paintings, drawings or sculptures look as close to the real world as possible. Like when you draw a picture of your family and you try to make them look exactly like they do in real life.
An artist who creates realistic art works very hard to make sure that their art looks like it could be a photograph or a real-life scene that you can touch and feel. They use shading, colors, and details to create the illusion that what you are looking at is real.
Realism was an art movement that started in the 19th century when artists wanted to break away from traditional ways of painting and show what the world really looked like. They wanted to show the world the way it was, without any fancy or unrealistic additions.
So, when you see a painting or sculpture that looks like it could be a real-life scene, like a picture of a person or animals, that's an example of realism in art.