To use rigid transformations to show that triangle \( \triangle GHI \cong \triangle L KJ \) by the SSS (Side-Side-Side) triangle congruence criterion, Bella can start by translating triangle \( \triangle GHI \) to match the orientation of triangle \( \triangle L KJ \).
The best first step would be to translate \( \triangle GHI \) along a vector that takes point \( G \) to point \( J \). This translation aligns the corresponding vertices \( G \) and \( J \), which helps in showing the side lengths correspond and facilitates further transformations (like rotations or reflections) if needed.
So the correct response is: Translate \( \triangle GHI \) along a vector that takes point \( G \) to point \( J \).