Harappan civilization was highly advanced, they had specially baked bricks and an amazing drainage system.

Modern day drainage system was derived from them

Potholes was something they intorduced

Their bricks used to makes structures were very different and are wonders

A lot of their sculptures and idols proove how amazing their artisans were

I hope the above text perfectly helps you mate

good afternoon

Answer:

neegalum Tamil ahh unga intro solunga l am Ravi from Chennai