Here's why:
* Expository text aims to inform or explain a topic. It uses facts, evidence, and logical reasoning to present information clearly and objectively.
* Limericks are humorous, short poems with a specific rhyme scheme and rhythm. They are primarily meant to entertain, not to inform.
While a limerick could contain factual information, its main purpose is not to explain or inform. It's more about creating a playful and memorable experience.