how do I find which transformation goes to the correct picture

In the first picture, the figure just moved to the right, the orientation is the same, so the new figure was generated by a TRANSLATION of the first figure.
In the second picture, the figure increased in size, but the orientation is the same, so the new figure was generated by a DILATION of the first figure. (This option is not available, so the answer in this case is NONE OF THESE)
In the third picture, the figure suffered a REFLECTION over the green line.
So the answers in order are TRANSLATION, NONE OF THESE and REFLECTION.