Why do noodles have a "twisty" history?

The significant structural shift that happens between chapters 21 and 22 is

Plz hurry the graph below shows the distances, in miles, that a dragonfly can travel in a certain number of hours: a graph titled motion of a dragonfly shows time in hours on the x axis and distance in miles on the y axis. the scale on the x axis shows number from 0 to 10 at increments of 2 and on the y axis the numbers are shown from 0 to 250 at increments of 50. a straight line joins the ordered pairs 0, 0 and 2, 50 and 4, 100 and 6, 150 based on the graph, what is the dependent variable, the equation relating the two variables, and how far will the dragonfly travel in 24 hours if it continues to fly at the same speed?

Read this excerpt from the grapes of wrath: snub-nosed monsters, raising the dust and sticking theirsnouts into it, straight down the country, across thecountry through fences, through dooryards, and in and outof gullies in straight lineswhich best describes the tone in this passage