Which one of these properties will never change when a figure is reflected across a line of reflection?

1. Position
2. Size
3. The y-coordinates
4. The x-coordinates

WHAT THE HELL DO YOU FREKAING MEAN POSTION CHANGES? WHY DO YOU SAY TH IS EVERYTIME LIKE ITS THE RIGHT ANSWER SIZE CHANGES I KNEW IT I HAD TO TRUST YOU WHY

1. Position