If i intend to achieve my goal, becoming an astronomy researcher, i must take a course load that includes high-level math and science classes.

identify the nonessential appositive phrase and the noun it renames or identifies.
a. my goal; i
b. becoming an astronomy researcher; goal
c. math & science; classes
d. a course load; researcher

"the tune the he might never know again." this part build anticipation. dexter got extremely happy by the piano tune. he could see what he was living at that moment in his life throught this feeling. the reader might want to learn more about his happy life. in fact, he called it a state of   'ecstasy'. the fact that he had got in a mood of intense appreciation and that everything about him was extremely bright and glamorous might lead the reader to feel that this state of happiness may not last long. the two parts from the excerpt that exemplify the anticipation are: " the sound of the "; " it was a know again."

to the people and they all dies in the end