To prove that the triangles \(\triangle PBK\) and \(\triangle LQA\) are congruent using rigid motions, we need to determine a motion that maps point \(B\) to point \(Q\) and effectively matches the orientation and dimensions of the two triangles.
The correct answer from the provided options would be:
Translation along the vector so that point \(B\) maps to point \(Q\).
This translation would correctly align the corresponding vertices of the two triangles, while maintaining their shape and orientation. After this translation, verify whether the other points align as well to confirm congruence.