Physical traits refer to the observable characteristics of an individual or organism. These traits can include features such as height, weight, eye color, hair type, and skin tone. They are often influenced by genetics, which is the study of how traits are passed down from parents to offspring. In addition to human traits, physical traits can also apply to animals and plants. For example, the fur color of a dog or the leaf shape of a tree are both considered physical traits. These characteristics help in identifying species and understanding their adaptations to the environment.