What distinguishes a physical model from other types of models?

A physical model is characterized by its ability to serve as a tangible representation of an object, allowing for a hands-on experience. This physical form can be used to demonstrate concepts, test designs, or visualize objects that may be too large, small, or complex to examine directly.

Physical models can be made on a scale that can either be smaller or larger than the original object, so saying it is always smaller is not accurate. In contrast, other types of models, such as digital models, are not tangible and cannot be physically manipulated, while a physical model enables users to interact with it directly. Additionally, physical models require materials and construction techniques to create, making the option stating that it requires no materials or construction incorrect. Hence, the defining feature of a physical model is indeed its nature as a tangible representation of an object.