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Adults tend to abandoned there past because it comes from fear or they have been traumatized. It pushing others away to avoid rejection its an inability to trust others
Answer:
The first occurrence (chronologically) was
Regional kingdoms began to replace most of the city-states of the northern region of Harappan Society.
Explanation:
Of all that are stated in the question, Regional kingdoms began to replace most of the city-states of the northern region of Harappan Society first occured
Around 4,350 years ago, many factors responsible for migration led people to abandon their settlements and migrate to southern and eastern regions of India, according to a study by Indian Institute of Technology Kharagpur.
This is also known as Indus valley civilization
