Personally, 2 would be my best guess as the rest don't really do much in the way of explaining lifeguarding basics.
Answer:
Of the sentences provided, it is number 4 that would be the best alternative topic sentence for this paragraph about innovations in what to do with the household waste we produce. The alternative topic sentence would be: "The costs and pollution generated by landfills force communities to think creatively about what to do with everything we throw out."
Explanation:
The fourth option is the most appropriate as an alternative topic sentence because it is the alternative sentence that best summarizes the topics in the paragraph. The paragraph mentions that not everything we throw out is recycled, and cities are responding by looking for ways to expand recycling, or turning trash into energy. They have also been looking at ways to speed up the process of decomposition to make landfills more efficient. These points can be summarized as concerns about costs and concerns about pollution as detailed in sentence number 4.
Sentence number 2 is just a repeat of the original topic sentence. Sentence 1 does not really incorporate the idea of making the waste decompose faster which was one of the options. And sentence 3 repeats information in the paragraph and does not really summarize all points.
It’s describing the moment of the snake
