Displacement of the spring is given by ______.

The correct answer is: X

The Spring force formula is given by,
F = k(x – x_o)
Where,
the spring force is F,
the equilibrium position is x_o
the displacement of the spring from its position at equilibrium is x,
the spring constant is k.
The negative sign tells that the visualized spring force is a restoring force and acts in the opposite direction.