Final answer:
Parallelism is a literary technique used to give equal value to multiple ideas by employing the same grammatical structure, creating a balance that makes the text more engaging and memorable.
Step-by-step explanation:
The literary technique that emphasizes the equal value or weight of two or more ideas by expressing them in the same grammatical form is known as parallelism. Parallelism creates symmetry and balance within a sentence, making the ideas communicated more memorable and rhetorically effective. An example of parallelism can be found in President John F. Kennedy's inaugural address, where similar structures enhance the persuasiveness of his speech. In literature, authors like F. Scott Fitzgerald use repetition of certain symbols, such as the green light in The Great Gatsby, to reinforce central themes or motifs. Both parallelism and repetition are used to make writing more engaging and to emphasize key points.