What are disadvantages and advantages of parallel circuits

Well,

Parallel circuits are circuits that have only one "line" running through all the appliances in the circuit.

A parallel circuit can be more advantageous to a series circuit because you do not have to use as much wire.

However, the fact that the current must run through every appliance could be a problem.  The most common is when an appliance (say a light bulb) wears out or breaks.

There is no longer a complete connection, and we now have an open circuit.

The parallel circuit I find the most annoying is Christmas Tree lights, where when one light bulb goes bad, all the other bulbs in that line go out.

My answer is opptionc, just check with anyone else

The answer is a i think