Metals were significant for the Harappans because they allowed them to produce stronger and more durable tools and weapons. Metal tools were more effective in tasks like cutting wood, carving stone, and crafting objects with more precision than tools made of stone or bone.
Writing was essential for communication among the Harappans and recording important information like economic transactions, religious rituals, and laws. This way, the Harappans were able to preserve their culture and pass down their knowledge from generation to generation, enabling them to progress and develop their civilization further.
The wheel was crucial for the Harappans because it made transportation of goods much easier and quicker. It allowed people to travel long distances and transport large quantities of goods efficiently and effectively. The Harappans were able to trade with other civilizations across long distances and establish connections with other cultures.
The plough was a significant innovation that transformed the Harappan agriculture. It allowed them to cultivate their land more efficiently, increasing their crop yields and providing a more stable source of food for their growing population. It enabled the Harappans to grow a surplus of crops and feed the larger population, thereby supporting the development of their civilization.