The answer is B )they are useful for organizing your thoughts
There are two different types. Similes and metaphors
similes compare two things using the words like or as.
Metaphors compare two things without the use of the words like or as.
One reason Steinbeck uses parallelism in the Grapes of wrath is because he wants to create a puzzle for the reader to decipher. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.