First of all, this is a stupid question.

Bittorrent is a P2P Conection. You download parts of the file from other people. Those people are uploading, or seeding, to everyone who wants to download it. These people are the peers. They are the ones that let you download the files you seek. That is how the Bittorrent system works. If there are no peers to seed the file, you won't get it.