Sexing is a way to tell if an animal is a boy or a girl. Boys and girls look different on the outside, and sometimes on the inside too. When someone needs to know if an animal is a boy or a girl, they look at the animal's body and compare it to what they know about boys and girls. For example, if they are looking at a bird, they might look at the shape of the bird's beak, the feathers, or the color of its head. This helps them figure out if it's a boy or a girl bird. Sexing is important because it helps people take care of the animals better, like knowing what kind of food or care they need.