Akeyblock is
a. a flat surface with layers of material cut away to create an image.
b. used to create a black outline before the color is added.
c. found on the surface of a wooden block where the carving is done.
d. a triangular shaped printmaking tool used to produce a rounded line.

A keyblock is used to create a black outline before the color is added. Correct B The term keyblock is used in printmaking.

It is the element of the design which contains most of the structural or descriptive elements of the design. It serves as a guide for the disposition of the other colours.

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.