Answer
A - The drawing should have molecules made of circles and squares (in a one-to-one ratio).
B - The drawing should have circles and squares fairly evenly interspersed.
C - The drawing should have circles and squares separated by their shapes into clumps of circles and clumps of squares.
Work Step by Step
A - The circles and squares should be connected (in a one-to-one ratio) because it is a compound and a compound is two elements chemically bonded together.
B - The drawing should have circles and squares evenly dispersed because a homogeneous mixture is one that has two substances mixed together (but not bonded).
C - The drawing should have circles and squares separated by their shapes because a heterogeneous mixture is one that has two substances together but in their localized regions.