Answer:
Puerto Ricans moving to the
East Coast is known as INTERNAL MIGRATION
Cubans and Dominican immigrants coming to America is known as EXTERNAL MIGRATION
Explanation:
Given that Puerto Rico is an unincorporated U.S. territory, and people from Puerto Rico are U.S citizens, who pay the U.S. federal taxes, hence, Puerto Ricans moving to the East Coast is known as INTERNAL MIGRATION, because they are part of the U.S.
While Cubans and Dominican immigrants coming to America are known as EXTERNAL MIGRATION because Cuba and Dominica are separate countries outside of the USA.
