Moral is the lesson you learn from the story
Explanation: john has only read two books, a scientific journal his mother acquired while working in the hatchery, and The Complete Works of Shakespeare. The name of the second book was The Chemical and Bacteriological Conditioning of the Embryo.
The simple predicate is "are interested".
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The word "gelid" in its denotative sense represents something frosty and that causes an intense cold. When we analyze this word in the description of the snakes of Medusa's head, we can consider that this word was used to describe the feeling of dread that the snakes caused, because the extreme cold is felt by people who are terrified. Therefore, we can consider that the snakes of Medusa's head were "gelids" because they managed to cause dread and a supernatural fear in those who saw them.