Work Step by Step
Choice (c) is correct because the Native Americans used fire to prevent trees from encroaching upon other plant and animal life, so an entire ecosystem was able to develop. Choice (a) is incorrect because hunting animals can lead to a decrease in species diversity. Choice (b) is incorrect because converting land can lead to habitat loss. Choice (d) is incorrect because slash-and-burn forest clearing directly contributes to deforestation and habitat loss. Choice (e) is incorrect because fertilizer additions to lakes and rivers can lead to eutrophication which can cause algal blooms and the death of autotrophic organisms.