Answer with explanation:
When we reflect a geometrical shape the two , Pre-image and Image are Congruent.
The meaning of the word congruent in context of a Polygon that, the Corresponding sides as well as Corresponding Angle of two polygons are equal.
It is given that, reflections preserve length and size. Also Corresponding Angle measure of two Pre-image and Image will be same.
The quality the reflection does not preserve is
Option C: Orientation