Answer:
When it comes to language, a word or word part can change in form and/or sound. Alternation is the same thing as allomorphs in morphology. Also called change.
Typically an online message board of some type. When I was an online student, we had the option to pull up a forum-like message board that gave us direct links to study-guides. We could also access textbooks and other resources from there.
Hope I could help!
I have no idea what the answer is but someone will.
