The answer is the third sentence: "Finally take care to put away all your supplies and clean your workstation, so you are ready for your shift in the morning." because the word 'so' is a conjuction.
I dont get what you are saying..
Answer:
the overall mood.
The tone of a story is how the author shows the general attitude in the story. So if the story seems sad through the words, you can assume the rest of the story will be as well.
Think of it as a horror movie. Weird or scary things happen in the beginning, and that general tone/theme will continue throughout.