Parallel structure or parallelism means repeating the grammatical form within the sentence. Repetitive grammatical elements in the sentence are similar or identical in structure, sound, meter or meaning. This technique contributes to the balance and effectiveness of written work, affecting readability and makes texts easier to process.
For that purpose, John Steinbeck used parallelism to emphasize the injustice that occurred to migrants during the Great Depression. He wanted readers to experience the lives of migrants. In order to achieve this, he created tones of passion, sorrow, anger and despair through his writing. In order to develop his tones and present it to readers in a more acceptable and understandable way, he used paralelism.