What literary device involves leaving out a conjunction between parts of a sentence to create a terse and impactful style?

Asyndeton is the literary device used to deliberately omit conjunctions between parts of a sentence. This technique creates a more concise and impactful style, allowing for a quicker pace in the writing and emphasizing the individual elements listed. By removing conjunctions, the writer gives a sense of urgency or intensity, which engages the reader more effectively. This method can create a rhythm that enhances the emotional weight of the phrases.

The other options, while they involve manipulation of sentence structure or rhythm, do not specifically pertain to the omission of conjunctions. Ellipsis refers to the omission of words that are understood from context, cataloging involves listing items or ideas with a conjunction, and parallelism focuses on balancing structure for clarity and style. In contrast, asyndeton focuses on the stark and lively presentation of ideas, making it the correct answer for this question.