Answer-
The first transformation for this composition is,
translation down and then to the left
and the second transformation is,
second transformation is a reflection across line c.
Solution-
As the orientation quadrilateral E'F'G'H' is same as of the EFGH, so it is neither rotated nor reflected. Though it has been slided to down, but as it is not aligned to the original image, so it must be translated left or right. In this case, it happens to be translated to left.
Then, it can be noticed that, all the vertices of E'F'G'H' are in same distance from line c as of the vertices of E''F''G''H''. Hence, it has been reflected across line c.