Explanation: The Indus Valley Civilization, also known as the Harappan Civilization, was one of the earliest urban civilizations in the world, flourishing in the northwestern regions of the Indian subcontinent. This civilization is known for its advanced urban planning, sophisticated drainage systems, and extensive trade networks. The timeline of the Indus Valley Civilization can be divided into several phases, including the Early Harappan, Mature Harappan, and Late Harappan periods.
The Early Harappan period, also known as the Early Harappan or Early Indus period, dates back to around 3300 BCE. During this phase, the civilization began to develop its unique cultural and technological characteristics. The Mature Harappan period, which is considered the peak of the Indus Valley Civilization, spans from approximately 2600 BCE to 1900 BCE. This period is characterized by the establishment of large urban centers such as Harappa and Mohenjo-Daro, which were well-planned with grid-like street layouts, public baths, and granaries.
The Mature Harappan period saw significant advancements in various fields, including metallurgy, pottery, and trade. The civilization had extensive trade networks that extended to Mesopotamia, the Persian Gulf, and other regions. The decline of the Indus Valley Civilization began around 1900 BCE, marking the end of the Mature Harappan period. The reasons for the decline are still debated among historians and archaeologists, with theories ranging from environmental changes to invasions by nomadic tribes.
It is important to note that the Indus Valley Civilization did not collapse during the BCE period, as suggested in option A. Instead, it reached its peak during this time. The Vedic age, mentioned in option B, is a later period in Indian history that is characterized by the composition of the Vedas and the development of Vedic culture. This period is not associated with the BCE period of the Indus Valley Civilization.
In conclusion, the Indus Valley Civilization reached its height during the BCE period, specifically during the Mature Harappan phase from 2600 BCE to 1900 BCE. This period is marked by significant urban development, cultural advancements, and extensive trade networks, making it a crucial phase in the history of the Indian subcontinent.