Answer:
Stories made more fantastic by invention and exaggeration.
Explanation:
"With only glimpses and imagination-enhanced stories to go on, humans have made many an interesting creature into a monster."
Based on the above excerpt, the speaker is talking about the way stories are made up. There may be different and multiple reasons to make stories up but most often it has to do with the appeal and interest of the people. He points out that with this form of imagination that man is capable of, there had been many instances of creatures depicted as unimaginable monsters. "Imagination enhanced" means to give more exaggeration to the already imagined figure of anything or anyone. They bring forth stories that are made more fantastic through the invention and exaggeration on the part of the writer.
