What phrase describes a parallel structure in a list?

Using the same grammatical form for each item in a list is essential for creating parallel structure. This means that all elements in the list maintain a consistent pattern, whether they are nouns, verbs, or phrases. For instance, if you start with a verb, all items should also begin with a verb, such as "running," "jumping," and "swimming," to maintain that parallelism. This not only enhances the clarity and readability of the text but also provides a smoother rhythm that makes the writing more engaging. A parallel structure allows the reader to easily follow along and understand the relationship between the items being presented. The other options do not contribute to parallel structure, as they either introduce inconsistency or do not involve a proper format for lists.