Physical characteristics refer to the observable traits of an individual or object. These traits can include features such as size, shape, color, and texture. For example, the physical characteristics of a tree might include its height, the color of its leaves, and the roughness of its bark. In humans, physical characteristics encompass attributes like height, weight, hair color, and eye color. These traits are often influenced by genetics and can vary widely among different populations. For instance, the physical characteristics of people from different regions may reflect adaptations to their environments.