Answer:
From the relation above we can conclude that the as the distance between the two plate increases the electric field strength decreases
Explanation:
I cannot find any attached photo, but we can proceed anyways theoretically.
The electric field strength (E) at any point in an electric field is the force experienced by a unit positive charge (Q) at that point
i.e

But the force F

But the electric field intensity due to a point charge Q at a distance r meters away is given by

<em>From the relation above we can conclude that the as the distance between the two plate increases the electric field strength decreases</em>
A sphere??????????
i think thats the answer
The answer would be D. Because the iron fillings are attracted to the magnet underneath the glass.