Naval Bases and Refueling stations. Hope that helped :)
Respuesta
Amazonas
Rio Negro
Rio Orinoco
Rio Magdalena
Y Mucho Mas.
Explanation:
Ay Bien Artas Que son Importantes
Answer: It is the difference between immigration into and emigration from the area during the year (net migration is therefore negative when the number of emigrants exceeds the number of immigrants).