Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to teach your cat to give a handshake [title] Obtain a clicker. [step] A clicker is a small plastic box that contains a strip of stiff metal. When pressed, the metal makes a distinctive " click-clack " noise.

Ending1: Clickers can be obtained in most pet stores. [substeps] The theory behind clicker training is that the cat will learn to link a sound (click-clack) with a reward (tasty treat). Ending2: You need your clicker for safety reasons. Other clickers come with a nylon tube at each end so that your cat can utilize the tube independently. Ending3: This means your cat is pulling on the plastic to let you know he is happy to hear it! A clicker is a series of small or chunky clickers that are located in your home. The larger the clicker, the stronger the sound will be. Ending4: It is used for greeting strangers who come by. There are several different clickers that give verbal commands to your cat.

Answer format: ending1/ending2/ending3/ending4