Ans: The ruins of two ancient cities, Harappa and Mohenjo-Daro (both in modern-day Pakistan), and the remnants of many other settlements, have revealed great clues to this mystery. Harappa was, in fact, such a rich discovery that the Indus Valley Civilization is also called the Harappan civilization.
Answer:
Subsistence agriculture
Explanation:
The Second Agricultural Revolution led to a decrease in subsistence farming rather than an increase.
In conclusion it xcludes exclusions
