Step 1: Idea:
Count the parts in the problem figure and in each answer figure. A figure that can be built must have the same number and the same shape of parts.
Step 2: Parts in the problem figure:
The problem figure has 4 square parts of equal size.
Step 3: Parts in the answer figures:
Option 1 has 4 triangles. Option 2 has 2 rectangles. Option 3 has 8 triangles. Option 4 has 4 squares.
Step 4: Match:
Only option 4 has 4 squares. Joining the four given squares side by side in a 2 by 2 pattern gives the figure in option 4.
Final Answer:
Option 4 is the figure that can be constructed.
\[ \boxed{\text{Option 4}} \]
