Explanation

Option 4 is correct because it completes the symmetrical triangular line pattern radiating from the center.

- The pattern is made of four squares forming a larger square.

- Lines from each square connect and point toward the center.

- The top-left, top-right, and bottom-left boxes already form continuous lines aimed toward the center.

- Option 4 mirrors the direction and angle of the lines from the other three, maintaining the central convergence and line continuity.