Question

Is my answer right?

When compared to strong nuclear force, gravitational force is

weaker; it is related to mass.

stronger; it is related to charge.

weaker; it is related to charge.

stronger; it is related to mass.

I guess it was A.

Answer 1

Yes cause force is weaker . and Nuclear

Answer 2

The fundamental forces go from strongest to weakest in this order:
strong
electromagnetic
weak
gravity

At least, they do this at normal every-day energy scales.
At higher energy we see the unification of electromagnetic and weak forces into the electroweak force. At even higher energy all 4 may be one single force.