The voice is the narrator who is telling the story you're reading, not necessarily a character from the story. While the point of view is the point of view of one of the characters from the story, telling his own feelings and visions.
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Answer:
The worst thing to happen to me is being used and manipulated by others.
the answer is C. pauses because he said it fast with out many pauses.
D. Because it talks about how you would not be able to enjoy the sport without the physics, however it says nothing on how scientific principals effect snowboarding.
I would interpret it as how people only look at reality, not what's inside or what they can't see.