In case you wondered, Pete says:
"A control is something that you use when you're trying to figure something out. If you have a puzzle that you've never done before and you're trying to do it and you don't know where all the pieces go, the top of the puzzle box sometimes may have a picture of what the puzzle looks like. And that is my example of a control."
MN says: "Anything else?"
Pete says: "Nope. That's it!"