Option 1: They used spindle whorls for spinning. This statement is correct. The ancient people of Harappan culture used spindle whorls for spinning thread and making textiles. Spindle whorls were small, disc-shaped objects made of terracotta or stone that were used to provide weight and momentum to the spindle while spinning.

Option 2: They practiced boat-making. This statement is correct. The people of Harappan culture were skilled boat-builders and used boats for transportation and trade. Evidence of boat-making has been found in archaeological excavations, including the discovery of boat-shaped stone anchors.

Option 3: They used metal money. This statement is not correct. The ancient people of Harappan culture did not have a coinage system and did not use metal as a form of currency. Archaeological evidence suggests that they engaged in a barter system for trade where goods were exchanged without a standardized medium of exchange.

Option 4: They used tools and implements of stone. This statement is correct. Stone tools and implements, such as blades, knives, and axes, were commonly used by the ancient people of Harappan culture. These stone tools were made from materials like chert and flint and were essential for various activities such as