Many of the achievements of the ancient Indus Valley civilization was due to their advanced knowledge of

Harappa and the city of Mohenjo-Daro werethe greatest achievements of the Indus valley civilization. These cities are well known for their impressive, organized and regular layout. They have well laid our plumbing and drainage system, including indoor toilets.

The correct answer is that their knowledge of construction and organization separated them from the rest.

Explanation:

They were great on their urban planning ang bilding brick houses, and frainage systems just no name a few.