Attribution allows others to copy, distribute, display and perform your copyrighted works,(along with derivative works based upon it) but only if you give credit for it. Non Commercial allows the same things as attribution, but only for non commercial purposes. No derivative works is when you let others copy, distribute, display, and perform only verbatim copies of your work, not derivative works based upon it. Share alike is when you allow others to distribute derivative works only under a license identical to the license that governs your work.
Here's an example of attribution:

photo by: Linda N.
When attributing it would be good to add a link to the photographer when possible.
ReplyDeleteDr. Burgos