Part A.
Answer: There have been many, but they have all failed.
Explanation: Henry brings up their past experience with the British, and point out they never had a successful reconciliation. "And judging by the past, I wish to know what there has been in the conduct of the British ministry for the last ten years to justify those hopes with which gentlemen have been pleased to solace themselves and the House."
Part B.
Answer: He asks questions and then answers them to lead the audience.
Explanation: He asks questions such as "Are fleets and armies necessary to a work of love and reconciliation?" to support his argument that the British cannot be trusted if they are bringing troops.
I can say that it depends on what you're writing like if you're writing a song then maybe you can search "Historical Songs" in the search engine and that may help you. I hope this helps.
Answer:
The use of parallelism enhances the paragraph by explaining the comparison made between writing and construction.