I would say the answer is number 4: Rain gardens are a natural way to reduce storm water runoff that pollutes local waterways
Explanation:
A topic sentence is meant to express the main idea of a paragraph, so I already scratch off number 1 and 2, since they do not have to do with polluted waterways and actions to stop it. This would mean it is between number 3 and 4. Although number 3 gives information about rain gardens, it does not mention that they are a way to stop or reduce pollution in local waterways. Therefore, the answer is number 4. I hope this helped!
ANSWER: #4 I would say #4 Rain gardens are a natural way to reduce storm water runoff that pollutes local waterways is correct because in the thesis statement it talks about how the water ways are polluted and number 4 is the only one that talks about pollution. (Sorry if I’m wrong) ♡♡
