However, I can provide you with a detailed explanation of the chapter to help you understand the concepts better. Let's dive into the key points of Chapter 3 of History for Class 6.

Introduction to Chapter 3: In this chapter, you will learn about the earliest societies and civilizations that existed in ancient times. You will explore the Harappan civilization, also known as the Indus Valley civilization, which thrived around 2500 BCE in the Indian subcontinent.

Key Points:

1. The Harappan Civilization: The Harappan civilization was one of the most advanced ancient civilizations. It was located in the Indus Valley, covering parts of modern-day India and Pakistan. The cities of Harappa and Mohenjo-Daro were the major urban centers of this civilization.

2. Urban Planning: The cities of Harappa and Mohenjo-Daro had well-planned layouts. They featured well-organized streets, drainage systems, and houses made of baked bricks. The presence of public buildings, such as granaries and assembly halls, suggests a well-structured society.

3. Agricultural Practices: The Harappans were skilled farmers who cultivated a variety of crops, including wheat, barley, and rice. They also domesticated animals like cattle, sheep, and goats. The fertile land of the Indus Valley supported their agricultural activities.

4. Trade and Commerce: The Harappan civilization had a well-developed trade network. Pottery, beads, and other goods were traded both within the civilization and with other regions. The presence of standardized weights and measures indicates a regulated system of trade.

5. Writing System: The Harappans had a unique script that is yet to be deciphered. This script was used for administrative purposes and is found on seals and pottery. It suggests a high level of intellectual and bureaucratic development.

6. Decline: The Harappan civilization declined around 1900 BCE. The reasons for its decline are still debated among historians. Possible factors include environmental changes, such as the drying up of the Ghaggar-Hakra River, and invasions by nomadic tribes.

Conclusion: The Harappan civilization provides valuable insights into the ancient world and its achievements. Studying this civilization helps us understand the early human settlements, urban planning, trade networks, and cultural practices of the time. It also highlights the importance of preserving and learning from our historical heritage.