I think it is c because abrasive can be to scrape and abound can be to exist in great quantities or numbers.
The correct answer is E - all of the above. An author's voice is made up by all of the answers listed. It allows the reader to understand the author, the tone, and the purpose of the story/poem.
The root word bi means two.
One example of this root word being used is the word bicycle.
The root word is used so as to tell people that this bicycle has two wheels.
A unicycle is a riding device that has one wheel.