Question

which particle flows to produce electric current

Answer 1

Electric current is the movement of negatively charged electrons along conductors. Do note that the although current is considered to flow from the positive end of a battery to the negative end of a battery, the electrons themselves are going from the negative end to the positive end.

Answer 2

follow ohms law.

Answer 3

Any flow of charged particles is current.

These particles are free electrons in metals, and positive and negative ions in solutions.