A, The river is constantly changing. I did this last year so I know what the answer is. Fickle means changing frequently or in my term, stubborn. In his point of view, the river has a mind of its own and changes often. Which he described as "fickle." It may be hard for Twain to pilot a steamboat, if the river is constantly changing.
"When the debate is lost, slander becomes the tool of the loser(s)" refers to certain people's tendency to turn the biterness and humiliation of losing an argument into personal attacks against the debate opponent and their image.
To <em>slander</em> means to defame, to say false things about someone in an attempt to damage their reputation.
This statement is often attibuted to Greek philosopher Socrates, but there isn't any evidence supporting the fact that he originated the phrase, so it would be best to avoid quoting Socrates in this case, especially in school assignments.
I think the answer is sending out light; shining or glowing brightly. all you had to do was googled the answer and that's what you get . hope it helped.