I believe that is called archipelago
What are the Choices. Please
Answer:
The arguments for imperialism included the US and Europe's desire to find new sources of raw materials, establish new markets for trade, spread Christianity and Western ideas, and create strategic military bases. The arguments against imperialism included the idea that imperialism was un-American and a fear of immigration to the US from colonized areas.
What I can infer from what Lewis and Clark saw when moving west from the Mississippi river is that the landscape along the river changed drasticallly. The forest receded, replaced first by the high prairie and then the shorter grass of the high plains. The temperatures became colder and as they continued their expedition by the river they realized that there was no water route to the pacific ocean, just more mountains.