Final answer:
The text detailing the history and culture of the ancient Egyptian civilization is the one with a purpose to inform, as it provides factual information on pharaohs, pyramids, and significant events intended for educational purposes.
Step-by-step explanation:
The text that has a purpose to inform is b) a text detailing the history and culture of the ancient Egyptian civilization including its pharaohs, pyramids, and important events. This text provides factual information about ancient Egypt and serves an educational purpose. It aims to enhance the readers' understanding by detailing various aspects of the civilization's culture and history. These details can include their science, arts, writing systems like hieroglyphs, and their impressive architectural achievements such as the pyramids. Additionally, insights into the different phases of the kingdom, from the Old Kingdom to the New Kingdom, would likely be explained.
A text's audience is important for understanding its purpose. In this case, informational texts are often written for a general audience with the intention of being public, quite different from a private letter or a text message. Texts which are meant to inform, like historical overviews or scientific articles, are crafted to be as clear and accessible as possible to ensure a wide comprehension.
Informative texts aim to provide context and expand the reader's knowledge base. Understanding the civilization's evolution and the various scientific advancements achieved by ancient Egyptians would certainly contribute to a reader's education on the topic, which is the hallmark of an informative piece of writing.