Final answer:
The copyleft principle is a concept commonly applied to open-source software and other creative works. It allows others to distribute and modify these works as long as they do so under the same license as the original work.
Step-by-step explanation:
The copyleft principle is a concept commonly applied to open-source software and other creative works. It allows others to distribute and modify these works as long as they do so under the same license as the original work. This means that any derivative works or adaptations must also be freely available to others under the same terms. One popular example of the copyleft principle is the GNU General Public License (GPL) which ensures that software remains free and accessible to the community.