tv and remote are connected

while exploring the mike in the sunshine area aunty asked what is happening when we talk in the mike. kids told sound is coming in the speaker. 

aunty: how it is coming in the speaker

kid: it is connected

aunty: how it is connected

kid: with wire

aunty: where is the wire, i cannot see the wire to the mike and the speaker

kid: tv also has the speaker and volume comes in the remote and they are connected

aunty: how it comes 

kid: remote has the buttons so when we press the buttons Tv volume gets increased, so when we use the mike button and talk in it sound comes in the speaker.