What made the cities of the Indus Valley Civilization impressive for their time?

Multi-story homes
Natural air-conditioning
Sewer systems
All of these

All of these made the cities of the Indus Valley Civilization impressive for their time.

All of these factors - multi-story homes, natural air-conditioning, and sewer systems - made the cities of the Indus Valley Civilization impressive for their time.

All of these factors made the cities of the Indus Valley Civilization impressive for their time.

To understand why these factors were impressive, let's break them down:

1. Multi-story homes: The cities of the Indus Valley Civilization, such as Mohenjo-daro and Harappa, were among the earliest urban settlements in the world, dating back to around 2500 BCE. One of the remarkable features of these cities was the existence of multi-story homes. The houses were constructed with multiple levels, which suggests a sophisticated understanding of architectural design and urban planning. Multi-story houses were not commonly found in other contemporary civilizations, making them unique and impressive.

2. Natural air-conditioning: The Indus Valley Civilization developed an advanced system of natural air-conditioning. The houses were built with carefully designed ventilation systems, including ducts and shafts, which allowed cool air to circulate and maintain comfortable temperatures inside the buildings, even during hot summers. This intelligent design took advantage of the wind patterns in the region and provided effective cooling, enhancing the quality of life for the inhabitants.

3. Sewer systems: The cities of the Indus Valley Civilization were equipped with an elaborate network of underground sewage systems. They had well-planned drainage systems, with covered drains running alongside the streets and houses. These well-engineered sewer systems demonstrate a remarkable level of urban planning and sanitation management. The sophisticated infrastructure of the sewage system indicates that the civilization recognized the importance of maintaining clean and hygienic living conditions, a feature that was not commonly found in other ancient cities.

Combining these factors, the Indus Valley Civilization demonstrated an advanced level of urban planning, engineering, and architectural knowledge. The multi-story homes, natural air-conditioning, and sewer systems set these cities apart from their contemporaries and make them remarkable accomplishments for their time.