This is a test of commonsense. Complete the next sentence:

How to replace a light switch
Purchase a new light switch that meets your requirements at a local home repair or hardware store.
Tell the store employee what kind of switch you want and how many you'll need, and they can help you determine the best purchase.
Single-pole switches are the simplest and most common.
A single-pole switch has just two positions-" on " and " off. " Disconnect the power to the light switch at your home's electrical service panel (also known as the breaker box or load center).