Question

translation, then reflection
reflection, then rotation
translation, then rotation
reflection, then translation

Explanation:

Step1: Analyze transformation from ① to ②

We can observe that the shape in ② is in the same orientation as ① but in a different position. This indicates a translation.

Step2: Analyze transformation from ② to ③

The shape in ③ is a mirror - image of ②. This indicates a reflection.

Answer:

translation, then reflection