Which change will cause an increase in the electric current produced through electromagnetic induction?

using more wire loops
using opposite pole of magnet
using a weaker magnet
moving the solenoid slower

using more wire loops.

Explanation:

When there is a change in magnetic flux linked with a coil changes, an emf is induced in the coil. This phenomenon is called electromagnetic induction.

the amount of induced emf developed is

If there are N number of turns in the coil, then induced emf is given by

Induced current is given by

i

So, as number of turns increases, the current produced is also increases.