Climate effects and human impacts, that is, nutrient enrichment, simultaneously drive spatial biodiversity patterns. However, there is little consensus about their independent effects on biodiversity. ... Species turnover rates caused by nutrients do not increase toward higher temperatures
C...the key is that they are photosynthetic...so they produce oxygen (like plants)!
You cant answer this without looking at the diagram. sorry.
Answer: i'm pretty sure its B!!!
Explanation:
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