Okay so, you didn't include a screen shot or anything of what the text is, so I tried my best to answer your question without it.
There may be no land at the North Pole due to the fact that it could just all be ice that's floating atop the Arctic Ocean. Over the past few decades, scientists have discovered that the ice is thinning, therefore the likeliness of land beneath it is not great.
conforming to the conventions of the middle class
make a mess of, destroy or ruin
effusively or insincerely emotional
lower someone's spirits; make downheartedrave
Answer:
A.
a formal and serious tone
Explanation: