Answer:
Migration is a form of geographic or spatial movement involving a change of usual residence between clearly defined geographical unit.Human beings,like other creatures,leave the place in which they dwell,in order to obtain some goals. The reasons they move from one place to another are geographical, social,political and economic as well.such movement is called migration.
Explanation:
Migration is measured by following measures:
1=In-migration rate
2=Out-migration rate
3=Net migration rate
4=Gross migration rate
Hope this helps you
Answer:
B. The higher up a mountain you go, the colder it tends to get (and in my experience, the drier too, but I don't want to assume that's always the case), therefore the number of plants that can survive tends to decrease.
Answer:
b) national
Explanation:
Military-political considerations frequently cast special operations into clandestine or covert environments; therefore, their activities normally involve oversight at the national level.
