Answer:
Line JM
Step-by-step explanation:
The drawing is missing. I will attach it with the answer.
The intersection between two planes is always a line (Except when the two planes are coincident).
In this case we have two planes :
Plane JPS which is the plane that contains the points J, P and S.
Plane Z.
We can see in the picture that the intersection is the line that contains the points J and M.
Therefore, we can call it line JM which is commonly named using this symbol ''↔'' over the capital letters JM.
