Answer:
He helps her with her fear of monsters by going along with it. He calls it the Imaginary Demon. By making her fear seem like a "real" thing, it adds humor to it and makes it less frightening.
Answer:
"Without innovations in food production, the factories could not have grown so quickly. The trend quickened after 1860 and continued throughout the 21st century as well."
Explanation:
Because in the previous sentence it already stated the same thing. (PS I probably got this wrong)