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3 votes
The unpleasant odor of many wetlands is caused by _____.

bacteria


the wastes of migrating waterfowl


the overabundance of phytoplankton


dead animals

2 Answers

1 vote

Answer:

A

Step-by-step explanation:

User Ahmad Sherif
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8.7k points
7 votes
Hello, I am almost 100% sure that many bacteria build up in environments like wetlands.
User Darya
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