Final answer:
The correct term for the part of a tire that meets the road in the context of impression evidence is 'tread pattern'.
Step-by-step explanation:
For impression evidence, c. tread pattern is used to describe the part of a tire that meets the road. The tread pattern includes the distinctive design and track left by the tire, which can be used in forensic science to identify the specific model of tire and potentially link the tire to a crime scene. It differs from sole marks, which are sedimentary structures, and raindrop impressions, which are concave imprints made by raindrops on soft sediment.