During which time period did the Harappa civilization exist?

The Harappa civilization, also known as the Indus Valley Civilization, existed during the period from approximately 2500 BCE to 1500 BCE. This ancient civilization was one of the world's earliest urban cultures and is known for its impressive city planning, sophisticated drainage systems, and advancements in various crafts and trade. The period noted reflects the height of the civilization's influence and expansion, as well as the time of its eventual decline due to various factors, including climate change and shifts in trade routes. The other time periods mentioned do not align with the archaeological and historical evidence indicating the active phase of the Harappan culture. Thus, the correct choice effectively highlights the timeframe in which one of the earliest known urban societies thrived in the Indian subcontinent.