Mmm. code-switching. An example of code-switching would be "It's very さむい right now”. This fits the definition of code-switching because it switches between Japanese and English.
I think it's A. It is definally not the climax as this happens when Beowulf kills the monster. It's not the resolution either as it is the first part of the text. Also, exposition seems a little unrelated.
No the water cycle dose not stop. the water cycle needs to keep going if it was to stop there would be no rain. the water evaporates and once it gets into the clouds it drops right, well if that was to stop there would be no rain the plants would be all dry.
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A sensory detail is a detail that has something to do with the 5 senses (sight, smell, hearing, taste and touch) I didn't see any examples in the question that you posted but I hope this helps
Explanation: