The way in which Reyaz can write his essay about global warming and engage his readers is:
We can see that the main purpose of the essay which Reyaz is writing about global warming is to engage the readers so that they would read till the end and find the essay topic interesting.
With this in mind, we can see that he would have to let them know the effects which the global warming would have on them in their local communities so that they can see that it can affect them too.
Therefore, the correct answer is option C
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