Chapter 29 of The Grapes of Wrath is an "inner" chapter and, therefore, short and lyrical in style. It is also a Biblical-styled chapter, as it depicts the Great Flood that is used as counterpoint to the Dust Bowl chapters earlier. Steinback makes use of pathetic fallacy (weather to depict emotional tone) as the apocalyptic weather is a kind of purgation--an excessive baptism that brings death across the land.
Answer:
setting: gloom
Explanation:
He's writing about a scary setting. It's as horrifying as it can be. He leads you carefully by the hand.
...<em>Cheering the mind from which darkness, as if an inherent positive quantity, poured forth upon all objects of the moral and physical universe, increased ... in gloo</em>m.
You can't get a better picture of gloom than this.
What are you even talking about