In English language, sow can be defined as an action word or a verb used to describe the act of planting seeds. The past tense for sow is sowed while sown is the past participle of the word sow.
Generally, seeds are sown in the ground. This ultimately implies that, seeds are planted in the ground to enable the seeds undergo a biological process that leads to the growth of plants.
As a rule of thumb, sown is to seed as cook is to food.
Hence, the Bible is like the seed that is sown in the ground.
Meaning of figurative language: The metaphor presents an implicit comparison between the girl's mental state and her unhappiness with a cloudy, melancholy and dull day.
Effect on tone and mood: The metaphor promotes a melancholy tone and a sad mood, as it shows how racism and intolerance can end the happiness of a child who is being prevented from having fun just by the color of her skin.
Effect on audience: This allows the audience to feel uncomfortable with racism, because it realizes how depressing it is for those who are attacked by it.