B. What the difference between emigration
land inmigration​

The difference between immigration and emigration is that Immigration is the process of moving out of your own country and permanently settling in another country. Emigration is the act of leaving your own country. For example, an Indian man decides to emigrate to Canada. To himself, and the country of India, the man is an emigrant to Canada.

Hope it helps you

answer; i believe its called ; checks   and balances;