The Harappans left behind a rich legacy of urban planning, advanced drainage systems, and well-constructed buildings. They also contributed to the development of trade networks, pottery, and seals that provide insight into their daily life and cultural practices. The towns they built, like Harappa and Mohenjo-daro, showcased sophisticated urban architecture. Their use of weights and measures and their skill in metalworking also influenced later civilizations. Despite the decline of their cities, the Harappan culture played a key role in shaping the history of the Indian subcontinent.

This question related to Chapter 6 Social Science Class 6th NCERT.
From the Chapter 6. The Beginnings of Indian Civilisation.
Give answer according to your understanding.