How do archaeologists know that the Indus Valley Civilizations engaged in trade? Answer in a sentence.

Archaeologists have found numerous artifacts such as beads, seals, and pottery from distant regions, suggesting long-distance trade networks and interactions with other civilizations, indicating the Indus Valley Civilizations engaged in trade.

Archaeologists have identified evidence of well-constructed urban infrastructure, standardized weights and measures, as well as the presence of exotic goods like Mesopotamian goods discovered in the region, suggesting that the Indus Valley Civilizations engaged in trade.

Archaeologists know that the Indus Valley Civilizations engaged in trade through the presence of artifacts like seals, pottery, and beads that are found outside the region, as well as the discovery of trade routes and evidence of long-distance transport and communication systems.