Hey there!
The word reflected means when something is basically coping everything that you do. So, for example, when I look in a mirror, the mirror would reflect everything that I would do.
So, from looking at the graph above, as we should remember the [tex] \left[\begin{array}{ccc}\boxed{x-axis}\end{array}\right] [/tex] is the [tex]axis[/tex] that is (horizontal) and the [tex]y-axis[/tex] is the [tex]axis[/tex] that is (vertical).
So, from knowing this information of graphs, we now know that [tex] \left[\begin{array}{ccc}AB\end{array}\right] [/tex] are reflecting over the [tex](x-axis)[/tex] which is the line that is (horizontal).
Your correct answer would be . . .
[tex]\boxed{\boxed{x-axis \ would \ be \ your \ answer}}[/tex]
Hope this helps you!
~Jurgen
