What are prints left in moldable substances like clay or snow called?

The correct term for prints left in moldable substances such as clay or snow is referred to as impressions. This is because an impression is created when an object or foot leaves a mark by displacing the material around it, thereby capturing the unique features of the object in the medium. In this context, clay and snow are soft enough to retain the shape of the object applied to them, allowing for a clear representation of the object's details.

Other terms describe different types of prints; for instance, plastic prints generally refer to three-dimensional impressions that are made in substances like wax or putty. Latent prints are those that are typically not visible to the naked eye and require certain techniques to be visualized, such as fingerprints left on smooth surfaces. Residue prints are associated with substances that may remain after a physical interaction, but do not precisely describe the moldable context in which impressions are formed. Thus, "impressions" is the most accurate choice in this situation.