Okay kiddo, imagine you are playing with your toys and you want to tell your friend who is in another room something really important. You can't just yell it out because your friend won't be able to hear you. So what do you do? You use a communication source!
A communication source is something that helps you send a message to someone else who is not physically near you. It can be anything that helps you communicate, like a phone, computer, radio or even a piece of paper with a message on it.
When you speak into your toy phone or type a message on your computer, the information travels through wires or waves in the air to reach your friend's device. This is called the communication channel.
But the message would still be gibberish if it wasn't for encoding and decoding. Encoding is when you put your message into a way that the communication source can understand, like typing letters or talking into a microphone. Decoding is when your message is turned back into something you can understand, like hearing your friend's voice on a speaker.
So there you have it, a communication source is like a magic device that helps you talk to people who are far away by encoding and decoding your message and sending it through a communication channel.