Answer:
A carved stone Indus merchant's seal found in Sumer
Step-by-step explanation:
These carved stone seals were utilized in the Indus Valley culture for the purpose of designation or making a distinction of commodities or merchandises and stamp clay on trade goods.
Hence, in this situation, the artifacts that can be attributed to the early Indus valley civilization engagement in trade is: "A carved stone Indus merchant's seal found in Sumer"