The given figure is a square.In a square all the sides are equal.
In parallelogram WXYZ sides WX=WZ
Substituting the values of the segments we have:
2m+4=m+6
Subtracting m both sides
2m-m+4=6
m+4=6
Subtracting 4 both sides
m=6-4
m=2.
m=2 will make the parallelogram WXYZ a square.
First option is the right one.
