<span>The purpose of an introduction in an essay is to grab the attention of the reader, by showing some attractive ideas and facts that would be treated in the content of the text. An introduction is not a kind of summary, but a first look at the text itself. Letter d) is the answer for this question.</span>
This is a reflective poem in which the author, John Donne, speaks his mind about death. It came into existence following an illness which he barely survived, and he speaks what he thinks of death in it.
Base on my own research, and further understanding about the said topic, I would say that the obstacles that Murad must overcome is the Choppy water. I hope you are satisfied with my answer and feel free to ask for more if you have question and further clarification about the said question