The correct option that differentiates gross physical evidence from trace physical evidence is:
Gross physical evidence is easily seen, while trace evidence is very small.
Gross physical evidence refers to large, easily visible items or materials that can be directly associated with a crime scene (e.g., a weapon, a body, or large clothing items), whereas trace evidence consists of tiny, subtle materials that may be transferred during a crime (e.g., hair, fibers, or paint particles).