Question

mention one piece of evidence to show that the Indus valley people had a developed industry

Answer 1

Indus Valley Civilization: Town Planning, Art, Social Life and Religion

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In 1925 archaeologists announced a spectacular discovery of immense urban ruins of two cities Mohenjo-Daro and Harappa divided apart by a distance of 640 km but identical in their layout, architecture and building technique.
In 1922 Dr. Rakhal Das Banerjee, the then Archaeological Superintendent of Western Circle noticed a Buddhist stupa at Mahenjo-daro in the Larkana district of sind (now Pakistan).

Answer 2

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here is your answer

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1.Harappan Civilisation.

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2.Textiles are rarely preserved and Harappan figurines are usually unclothed

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3.The archaeologists had to depend on various stray materials and evidences to determine the origin of Harappan Civilization.

the streets were board varying from 9feet to 3feet

Some archaeologists are of opinion that the date of Indus Valley Civilization was between 3250 B.C. and 2750 B.C.  

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