Final answer:
Nonfiction children's literature is the most useful for providing factual information and enhancing knowledge of the real world, offering both factual content and engaging narratives.
Step-by-step explanation:
When considering children's literature for the purpose of providing factual information and enhancing students' knowledge of the real world, the most useful type would be nonfiction. Unlike fiction, which is created from the imagination, nonfiction is based on facts and real events. These may include autobiographies, textbooks, reports, and documentaries, which are all intended to convey accurate information. Creative nonfiction is a subset of nonfiction that tells true stories with a focus on a more immersive and engaging narrative style. However, whether creative or more informational, nonfiction is key to providing students with an understanding of the world around them through factual content.