Answer:
1. You can use them to indicate what other people are allowed to do with your work
2. This license lets others remix, adapt, and build upon your work even for commercial purposes, as long as they credit you and license their new creations under the identical terms
3. one of the licenses created by the Creative Commons project. A work licensed in this way allows the following: The freedom to use and perform the work
4. This license lets others remix, adapt, and build upon your work non-commercially, and although their new works must also acknowledge you and be non-commercial, they don't have to license their derivative works on the same terms
5. This license lets others remix, adapt, and build upon your work non-commercially, as long as they credit you and license their new creations under the identical terms
