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Option 4 : All (A), (B) and (C)
Migration is the physical movement of people from one place to another; it may be over long distances, such as moving from one country to another, and can occur as individuals, family units, or large groups.
- When referring to an international movement, migration is called immigration.
Hint Reasons for Migration:
- Employment opportunities
- To escape a violent conflict
- Environmental factors
- Educational purposes
- Marriage or to reunite with family.
Hence, given above the statements are correct.
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