Social Studies, 25.05.2021 17:10 kgonzalez200061

Question 3 Which of the following is NOT one of the ways that humans upset the balance in an
ecosystem?
1.by bringing in harmful plants
2.by destroying too many trees
3.by studying plants and animals
4.by using pesticides

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Question 3 Which of the following is NOT one of the ways that humans upset the balance in an
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