To answer your question, me is an object pronoun, so the correct answer is : Pronoun
I think it is not a hook......a hook is like a statistic, or just a statement related to the topic
"<span>Carbon dioxide is a gas released into the air by the burning of fossil fuels. CO2 traps the heat and creates a "greenhouse effect" on the earth. In the United States transportation and the burning of fossil fuels to make electricity are the biggest factors to the CO2 pollution. " is correct</span>
No, it's a conjunctive adverb