Afghan refugees living in Iran to escape terrorism - Push factor
Bangladeshi migration to India due to flood - Push factor
Admission to university in England - Pull factor
Migration to Canada for a better lifestyle - Pull factor
Migration to America to escape religious persecution - Push factor
Entrepreneur moving to Singapore for a better business opportunity - pull factor
The concept of Peak Oil was first developed in the 1950's by the geologist M. King Hubert.
The answer is A a warm climate and good water supply. The coastal plains are known for having a sole source of drinking water as well as a good warm climate.
I hope this helps ! <3