The verified response to “Ancient History question: Harappan houses were generally built of:” is Baked bricks, option B. The original question-specific evidence states: Baked bricks were widely used in Harappan architecture. Baked bricks is the correct answer to “Harappan houses were generally built 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 Bamboo, Stone slabs and Wood only do not satisfy the same combination of site, feature, river region, crop, craft, discovery, chronology or cultural association. Replaying that method confirms Baked bricks as the keyed response for this Ancient History question.