Allowed for echolocation and underwater discoveries such as study of marine life
Answer:
B. Primary Source
Explanation:pe
It is a primary source, because it is coming straight from the person who said it. If it was from a person listening, it would be a secondary source. An artifact is something physical, that you can hold, like a dinosuar bone.
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Answer:
The Mexican Revolution (1910-1920) then increased the flow: war refugees and political exiles fled to the United States to escape the violence. Mexicans also left rural areas in search of stability and employment. As a result, Mexican migration to the United States rose sharply
Explanation:
