Answer:
Common Ancestry
Explanation:
This may be because they share a common ancestry or maybe should I say background so they tend to practice the same customs and traditions
Japan I think but not to sure
Gabon, Congo, Democratic Republic of Congo, Uganda, Kenya, and Somalia.
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
Answer:
Hydrogen in the core of the star is converted to helium by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by fusion, the core becomes unstable and contracts.