Answer:
Line, texture, space, color, form, value and shape. (I believe that is the 3rd option listed)
Explanation:
Google! :)
A model is a three-dimensional of a person/thing or of a proposed structure.
A mock up is a model or replica of a machine or structure, used for instructional or experimental purposes.
A prototype is a first or preliminary version of a device or vehicle from which other forms are developed.
