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Q: why are rivers and oceans both barriers and roadways?
A: They are barriers because you need the proper type of vessal or a bridge to cross. They are roadways because you can use a boat or ship to travel down a river or across an ocean to other places.
Original conversation
User: why are rivers and oceans both barriers and roadways?

Weegy: They are barriers because you need the proper type of vessal or a bridge to cross. They are roadways because you can use a boat or ship to travel down a river or across an ocean to other places.
sls23|Points 832|

User: list and describe a specific example of an ocean or river and how it was a barrier and/or roadway.

User: list and describe a specific example of an ocean or river and how it was a barrier and/or roadway.

User: central and south america User: list and describe a specific example of an ocean or river and how it was a barrier and/or roadway

Weegy: The Amazon River is an example of a river that's a barrier and a roadway. It's located in the northern third of South America. It's a barrier because it runs 6,400 kilometers, splitting the continent, and it's hard to reach through the rain forest. [ Tributaries are long and fanned out, splitting up the land. It's a roadway because the main river (which is usually between one and six miles wide) is navigable for large ocean steamers to Manaus. Smaller ocean vessels of 3,000 tons and 5.5 m (18 ft) draft can reach as far as Iquitos, 3,700 km (2,300 miles) from the sea. Smaller riverboats can reach 780 km (486 mi) higher as far as Achual Point. Beyond that, small boats frequently ascend to the Pongo de Manseriche, just above Achual Point. ]

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