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Which of the following represent human systems?

Hoover Dam
genetic engineering
volcanic eruptions
the Panama Canal
plate tectonics

Respuesta :

sixdoubleo
Hoover Daaaaaam and Volcanic Eruptions 
brooklynolson2000

Answer: the answer is Hoover Dam

genetic engineering the Panama Canal I found this out because after my stuff is graded I get the answers

Explanation:

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