Question

how can you describe the transformation? slide flip turn

Explanation:

Step1: Analyze the transformation

A slide (translation) moves a figure without rotating or flipping it. A flip (reflection) creates a mirror - image. A turn (rotation) rotates a figure around a point.
Looking at the figures A and B, the orientation of the sides of the figure has not changed in terms of being a mirror - image (so not a flip) and there is no rotation (so not a turn). The figure has just been moved horizontally.

Answer:

Slide