Final answer:
A flat work of art has two dimensions: height and width. Height is the vertical extent and width is the horizontal extent. The correct answer to the question is c) Height.
Step-by-step explanation:
A flat work of art has two dimensions, which are known as height and width.
When discussing the dimensions of a flat artwork such as a painting or a drawing, height refers to how tall the artwork is from its base to its top, while width is the extent of the artwork from one side to the other.
These two dimensions create the surface area of a piece but they do not include depth, which refers to the third dimension and is associated with three-dimensional artworks like sculptures.
In a three-dimensional object, mass is considered as a measure of volume and density, which gives the impression of weight. The correct answer to the question is therefore c) Height.