More potential energy will be transferred into a system of magnets when moving against a (pick one: stronger or weaker) force

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

answer; how far out of place which the object finished relative to the starting location;