The total time span of the Harappan Civilisation ranges:

The correct option is From 6000 BCE to 1300 BCE.

To understand the timeline of the Harappan Civilisation (also known as the Indus Valley Civilisation), it is helpful to look at its development in phases, from its earliest precursor settlements to its gradual decline:
1. Pre-Harappan / Early Agrarian Phase (circa 6000 BCE to 3300 BCE): The roots of the civilisation lie in early agricultural communities such as Mehrgarh (often dated even earlier, around 7000–6000 BCE). During this time, early farming, domestication of animals, and initial village settlements began to emerge in the northwestern subcontinent.
2. Early Harappan Phase (circa 3300 BCE to 2600 BCE): This phase saw the emergence of early urban traits, trade networks, and distinct pottery styles, forming the foundation of urban planning.
3. Mature Harappan Phase (circa 2600 BCE to 1900 BCE): This was the peak period of the civilisation, characterized by highly sophisticated brick-built cities, drainage systems, uniform weights and measures, and overseas trade.
4. Late Harappan Phase (circa 1900 BCE to 1300 BCE): During this period, the cities began to decline, leading to de-urbanization, population dispersion, and gradual integration into subsequent regional cultures.

When measuring the entire evolutionary timeline—spanning from its earliest agrarian foundations to its final fading stages—the total time span of the Harappan Civilisation ranges from approximately 6000 BCE to 1300 BCE.