Which of these is not a feature of parallel structure?

creating consistency in a series of words and phrases
expressing more than one idea in a single sentence
mixing as many forms of words and word endings as possible
making thoughts more interesting and easy to understand

The option that is not a feature of parallel structure is the one that reads as follows: Mixing as many forms of words and word endings as possible.

Explanation:

Parallel structure, also called parallelism, is the repetition of a chosen grammatical structure within a sentence. By making each compared item or idea in your sentence follow the same grammatical pattern, you create a parallel construction. Parallelism adds claritiy to your writing, so when you use parallel structure you increase the readability of your writing.

i used to know but i learned it a long time ago sorry

explanation:

what do you mean