Final answer:
Grammatical parallelism is the use of similar or equivalent constructions of phrases or clauses to emphasize an idea and create balance within a sentence. It helps readers understand the organization of information. Parallelism can be used in engineering communication to support ideas and make them more impactful.
Step-by-step explanation:
Grammatical parallelism is the use of similar or equivalent constructions of phrases or clauses to emphasize an idea and create symmetry and balance within a sentence. It helps readers understand the organization of information presented in a document.
For example, in President John F. Kennedy's inaugural address, parallelism was used to emphasize the idea of collective effort for the success of liberty in the United States. This rhetorical technique can also be used in engineering communication to organize support for ideas and make them more impactful.