The plot begins with a nightmare: king arthur sits above “hideous deep black water” and then falls into a pit of snakes and monsters. this nightmare is an example of

a. mood

b. foreshadowing

c. setting

d. tone

The correct answer is B.

This is an example of foreshadowing. This is when the plot gives you details, so in this case the nightmare, that symbolizes a dreadful event will take place sometime later in the story. Foreshadowing is a technique used to hint at something that will transpire in the story and the foreshadowing nearly always appears at the beginning of the story.  

search it up on google or think from your brain make it work harder.

i   believe   the   answer   is   d