The details from the excerpt that best support the conclusion that this story is about the creation of the world are:
A. Things turn into geographical features of the Earth, such as the Himalayas, when the Eldest Magician blows on them.
E. The author refers to the animals as "All-the-Elephant-there-was," "All-the-Beaver-there-was," and "All-the-Turtle-there-was."
These options emphasize the transformation of elements into significant geographical features, which is central to the theme of creation in the story.