Final answer:
An author's use of long and complex sentences can create a sophisticated tone, slow down the pace, and build suspense in a story.
Step-by-step explanation:
An author's use of long and complex sentences can have several effects on a story. Firstly, it can create a more sophisticated and formal tone, conveying a sense of complexity and depth. Secondly, it can slow down the pace of the story, providing a detailed and descriptive experience for the reader. Lastly, long and complex sentences can also serve to build suspense or emphasize certain ideas or emotions.
Learn more about Effect of long and complex sentences on a story