Answer:
magnetic attraction
Step-by-step explanation:
The process of flow of current is best understood by considering the electron motion. Current is the flow of charge from one area of high concentration to an area of lower concentration. This creates a force which causes the current to flow in the circuit.
The charge flows in a particular direction (high to low concentration) down a concentration gradient. The flow of current creates domains.
Opposite directions create opposite domains. These attract each other. The equivalent is a magnetic attraction.