Which figure from the options completes the figure matrix below?

Answer & explanation
Correct answer: option 2
The correct answer is Option (2) →
In each row, the third figure is the first figure with the lines of the second figure taken away. Doing the same with the first two figures of row 3 gives the missing figure.

Why the other options are incorrect
Option (1) — Incorrect. It puts the two figures together instead of taking the second away from the first.
Option (3) — Incorrect. It has an extra line that is in neither of the first two figures.
Option (4) — Incorrect. It keeps a line of the second figure, which should be taken away.