The verified response to “Ancient History question: Harappan seals were mainly made of:” is Steatite, option C. The original question-specific evidence states: Most Harappan seals were made of steatite. Steatite is the correct answer to “Harappan seals were mainly made of:”. This evidence connects the required Ancient History fact with its archaeological, geographical, cultural or chronological setting. Harappan evidence must be interpreted from excavated settlements, artefacts, environmental data and comparisons among sites; a single object should not automatically support a wider claim than the evidence permits. The choices Bronze, Copper and Iron do not satisfy the same combination of site, feature, river region, crop, craft, discovery, chronology or cultural association. Replaying that method confirms Steatite as the keyed response for this Ancient History question.