Answer: Circuit board diagram, option B.
Step-by-step explanation:
The map of the current flow is called a circuit board diagram, which is a map that shows the path that does the current in a board, showing the resistances, capacitors, switches, etc.
The other options:
A) a circuit map: this does not exist
C) a Parallel switch: This is a type of switch that you can see in the circuit board diagram.
D) a series circuit: This is a type of circuit, where we have two smaller circuits one next to the other.