Answer:
A: Closed
Explanation:
A closed circuit is a circuit where electricity can flow from one end of the battery to the other, all the components of the circuit are conductors.
An open circuit is where electricity cannot flow through from one side of the battery to the other. This kind of circuit is used for alarm systems, where a switch is used to close the circuit, so that the alarm can sound.
Parallel circuits are circuits that allow multiple connections/pathways that the electrons can travel through. These connections are used in homes, whereby you can have one light off, and another light on.
Shorted circuits are circuits that shorten the pathway between the positive and negative sides of the battery, this allows a lot of electrons to flow through uncontrollably and end up heating the wires and this can be a fire hazard.
