Plethora would be the collective noun because it is a group.
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<u>Answer:</u> The author describes the dangerous situation that the characters in the story are facing.
<u>Explanation:</u> As we read each part from the passage, we see that all of them contain one thing. And, what exactly is that? We see that all of them contain the situation that they're all experiencing at the moment.
<u>Cited text:</u> <em>“I shouldn’t think of this as easy. I know what I need to do here, but I could lose one these men if just one thing goes wrong.”</em>
We can see that this is a present statement, and that something is going wrong between those people. I'm supposing it's a fire or something of that nature.
Answer: When burning oil, coal, and gas, we don't just meet our energy needs—we drive the current global warming crisis as well. Fossil fuels produce large quantities of carbon dioxide when burned. Carbon emissions trap heat in the atmosphere and lead to climate change.
Explanation:
I don't know any of the other similes because I have no idea what poem you read but here is the answer to what growing old like an onion could convey:
Onions are layered, as they grow more and more layers grow. This could mean that as Rachel grows, she gains more layers of knowledge and experiences and they keep layering over time as she grows.