It's pronounced Bla-guard. Don't say the "ck"
The narrator is Strickland, as to his role: well it is his story.
We must, therefore, acquiesce in the necessity, which denounced our Separation, and hold them, as we hold the rest of mankind, Enemies in war, in Peace Friends.
A) because he has been waiting to catch a fish and after waiting for so long he finally catches one and even though it took so long he is still interested
The theme is the message an author is trying to send, or the main idea. The author's purpose is the reason an author writes something, whether it be to inform, entertain, etc.