The answer is: To emphasize the horror of what has happened.
Silent Spring is an environmental book written by Rachel Carson in 1962. She focused her attention on environmental problems specially the ones caused by synthetic pesticides. Carlson wrote the book after researching to make American people aware of the problems they were facing. Even though it had opposition from the chemical companies, it brought about important changes.
c. criticize
(connotation's number one synonym is meaning, so what has a similar meaning to denounce: criticize)
Yes, the correct answer is B because in the first line they said something about the destruction and described it as fiery. Fires are actually fiery that's why the answer is being burned alive... :)