Answer:
1. A series circuit is a closed circuit which has all loads connected in a row and there is only one path for the current to flow.
2. The Ohm's Law state that a current flow through a resistor is directly proportional to the voltage across it

3. A parallel circuit is a closed circuit divided into branches that it has two o more paths for the current to flow and the loads are parallel to each other which mean the voltage across them is the same for all loads.