Answer:
Migration is the movement of people from one place to another .
Migration is affected by various factors like age, sex , martial status , education, occupation , employment etc. Age and sex are main demographic factors that effect the migration . Men, generally , migrate to other places quite often though there are more women who migrate to husbands' places after marriage.
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The constitutional principle prohibits an individual state from declaring war is called federalism. The only person who can declare war is the person in charge of the government, which is the President of the United States. The correct answer is B.
