Question

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

Explanation:

To get from figure 1 to figure 2, first we can observe that a reflection (flipping) is needed to change the orientation. Then, a translation (sliding) is required to move the reflected figure to the position of figure 2. Rotation is not needed as there is no turning - like transformation required to match the orientation and position.

Answer:

reflection, then translation