Final answer:
Scratch and its engine use the GNU General Public License v2.0, while content created with Scratch falls under the Creative Commons Attribution-ShareAlike license to promote sharing and collaboration.
Step-by-step explanation:
The Scratch programming language and its engine are licensed under the GNU General Public License v2.0. The content created using Scratch is covered by the Scratch Terms of Service, and users can share their projects under a Creative Commons Attribution-ShareAlike license. This licensing structure is chosen to encourage sharing and collaboration, allowing users to freely use, study, modify, and distribute the software and the projects created with it, while also ensuring credit is given to original creators.