Option a is the correct answer. Statement 1 is correct: The Harappa Civilization, also known as the Indus Valley Civilization, exhibited a high degree of uniformity in various artifacts. The pottery, seals, bricks, and weights found across different Harappan sites display consistent features, indicating a standardized production and possibly a centralized control over the civilization. Statement 2 is incorrect : The late Harappa sites did not maintain the exact same construction techniques as the mature Harappa sites. Over time, there were changes and variations in construction techniques and architectural styles within the Harappa Civilization. The late Harappa sites used less baked bricks and more mud bricks, and their drainage systems were less efficient and less uniform. The late Harappa sites also lacked the chessboard layout, the granaries, and the public baths that were common in the mature Harappa sites