Option d is the correct answer. Mehrgarh has revealed the earliest evidence of settled life in the Indian subcontinent . Mehrgarh is known for its Neolithic and pre-Indus Valley Civilization settlements. One of the key discoveries at Mehrgarh is evidence of early agricultural practices. Archaeological excavations have uncovered evidence of domesticated plants and animals, including wheat, barley, cattle, and sheep. This shift from a nomadic, hunter-gatherer lifestyle to settled agriculture was a crucial step in the development of human civilization.