Abrupt shifts in writing should be avoided because they can disrupt the flow of the text and confuse the reader. Sudden changes in tone, style, or subject matter can be jarring and make it difficult for the reader to follow the narrative or argument being presented. Consistency in writing helps to maintain the reader's engagement and comprehension, so it is important to transition smoothly between ideas and maintain a cohesive structure throughout the piece. Additionally, abrupt shifts can make the writing feel disjointed and unpolished, leading to a less effective and impactful piece overall.
