Why is the Stone Age evolution called 'multi-linear' in India?

Because different geographic regions progressed at different speeds, with hunting-gathering persisting in some areas while agriculture began in others.

Stone Age in India: Tool Technology & Periods

Q: Consider the following statements about Stone Age in India: 1. Different periods are identified on the basis of the type and technology of stone tools. 2. There are no regional variations in the type and technology of tools in different periods. 3. Stone Age cultures of different periods evolved uniformly in a neat unilinear fashion all over the subcontinent. Which of the statements given above is/are correct?

In India, Stone Age periods are identified by tool technology. Evolution was not uniform or unilinear, and significant regional variations existed across the subcontinent.

ID: HIS_ANC_2020_221 Ref: Upinder Singh, A History of Ancient and Early Medieval India

Consider the following statements about Stone Age in India:
1. Different periods are identified on the basis of the type and technology of stone tools.
2. There are no regional variations in the type and technology of tools in different periods.
3. Stone Age cultures of different periods evolved uniformly in a neat unilinear fashion all over the subcontinent.

Which of the statements given above is/are correct?