Many of the achievements of the ancient Indus Valley civilization were due to their advanced knowledge of urban planning, engineering, and water management. They developed sophisticated drainage systems, well-planned cities with grid layouts, and advanced architecture, including the use of baked bricks. Their understanding of metallurgy, trade, and agriculture also contributed to their success. The civilization's ability to manage resources, including water through reservoirs and wells, played a crucial role in supporting their urban centers and agricultural practices. Additionally, their knowledge of weights and measures facilitated trade and commerce, further enhancing their economic stability.