___________ is the number of migrants related to the population that may have migrated during a given migration interval. (a) Migration rate (b) Emigration rate (c) Balance of migration (d) None of the above

___________ is the number of migrants related to the population that may have migrated during a given migration interval.

(a) Migration rate

(b) Emigration rate

(c) Balance of migration

(d) None of the above