Hi, i know its already been answered but i could use the extra points. Signal words are like hints. Get it? "signal words". they help the reader guess about whats going to happen
The main function of signal words or transition words is to help listeners understand the direction of the conversation, the relation between the ideas, and the importance of ideas.
I think the casket is a symbol of death and it is also a symbol of cruelty of the narrator that he took Doodle to see it and touch it to emphasize that they thought he was going to die so needed to be brought face to face with it.