Why is the Harppan culture considered a civilization?

The Harappan culture, also known as the Indus Valley Civilization, is considered a civilization due to its advanced urban planning, sophisticated drainage systems, and standardized weights and measures. It featured well-structured cities like Harappa and Mohenjo-Daro, which had organized layouts, public baths, and granaries. Additionally, the presence of a script, trade networks, and a degree of social organization further exemplify its complexity and cultural development, marking it as one of the earliest known civilizations in human history.