In what two respects is Harappan Civilisation our greatest heritage?

Harappan Civilisation is our greatest heritage as:

1. The Harappan way of making baked pottery, bricks, beads, jewellery, textiles, etc. was adopted by the later civilisations. Cultivation of cotton was the biggest achievement of Harappan civilisation which adopted by Egyptians after several centuries.
2. In the religious sphere, the worship of Pashupati Shiva, the female deity as Mother Goddess, sacred trees, animals, serpents, religious symbols, etc. which were prevalent during the Harappan period, some of them have continued to this day.