Pedro uses a bar magnet to pick up a nail. He then touches the tip of the nail to some staples.

The bar magnet can magnetize the iron nail while it is in contact with it, allowing the nail to attract the staples. The nail is a temporary magnet because it generally loses most of its magnetism when removed from the bar magnet. The bar magnet remains a permanent magnet, so the correct choice is “The nail has become a temporary magnet, while the bar magnet remains a permanent magnet.”

AI-written and checked against the verified answer.