They explain through storytelling how things came to be or how the world came into existence.
The irony is that Tom is more educated then Huck, but makes it very complicated to free Jim, instead of doing it the simple way.
Answer:
:D means you are laughing opening your mouth where as :) simply means smilling.
C. It explains how important memory is to Wiesel.
People that do not know their history are doomed to repeat it, this si why it´s so important for Wiesel that we all keep in our memory the fatal events of our past.