Final answer:
The correct answer is C. Dynamic. The force-scale equivalence relates to dynamics as it concerns the relationship between forces, mass, and motion, indicating that the similarity is indeed Dynamic.
Step-by-step explanation:
The force-scale equivalence relates to dynamics, as it involves the relationship between forces, mass, and motion. In dynamics, especially in the context of rotational motion, we find direct analogs to force and mass that adhere to our experiences with linear dynamics. The similarity that is related to the force-scale equivalence is therefore Dynamic (C. Dynamics), as it deals with the causes of motion through the understanding of forces and their effects.