The Mississippi River has many small tributaries, but its primary tributaries are the Ohio River and the Missouri River. The Amazon River also has a large number of tributaries, including the Rio Negro, which is one of the largest rivers in the world in terms of volume. The Nile’s primary tributary is the Atbara River.
The answer to this would be A, because they began to spread westward once they decided to head away from the Arctic.
Answer:
1:A, as the primary sector is for the extraction of raw materials and logging includes the extraction of the raw material of wood.
2:C, as the Tertiary sector is in charge of service, downloading music is a service.
3:Shanna would be in the secondary sector as the secondary sector is in charge of manufacturing goods, vehicles, ect
The term is upwelling that is the answer to your question.