Answer:
Metaphor is iterary device is used in this quote, "Yet all experience is an arch wherethro' Gleams that untravell'd world whose margin fades For ever and forever when I move."
Explanation:
When something becomes something else to deepen understanding for the reader and bring extra imagery into play
I'm not 100% sure but I think it is A. Sorry if it is wrong.
The correct answer is the last option.
To credit a source means to ACKNOWLEDGE WHERE YOU FOUND A SOURCE. In order to avoid plagiarism, the writer has to cite the sources where he found information, being the most common citation formats APA or MLA. The citation style to use will depend on the topic to discuss in the paper.