Final answer:
Electricity flows from high potential to low potential. A circuit is an unbroken loop of conductive material. Lights in a line along a circuit represent a series circuit.
Step-by-step explanation:
Electricity Flow, Circuits, and Circuit Types
Electricity flows from high potential to low potential. Just as water flows downhill from a high elevation to a lower one, electrical charges flow from a point of higher electric potential energy to a point of lower electric potential energy. Thus, in the context of a battery, electrons flow from the negative terminal, which has a lower potential, to the positive terminal, which has a higher potential.
A circuit is an unbroken loop of conductive material through which electrons can flow continuously. This loop includes a voltage source such as a battery, and may include other components such as resistors or capacitors which control the flow and distribution of electrical energy.
Lights strung together in a line along a circuit would be an example of a series circuit, where the current flows through each light or component one after the other. If one light were to fail, the whole series would be interrupted because the electrical path is shared among all components.