6. what does parallel structure improve in writing?\na. vocabulary\nb. tone\nc. genre\nd. readability

Brief Explanations:

Parallel structure, also known as parallelism, is a writing technique that involves using the same grammatical structure for similar elements in a sentence or paragraph. This technique helps in making the writing more organized, balanced, and easier to follow. Vocabulary refers to the words used in writing, tone is the attitude of the writer, and genre is the type of writing (e.g., fiction, non - fiction). None of these are directly improved by parallel structure. Readability, which is how easy it is to read and understand the writing, is enhanced by parallel structure as it creates a rhythm and logical flow.

Answer:

d. Readability