Which sentence is the best example of a topic sentence? The urban areas are riddled with crime and poverty.
Crime is a factor.
Crime is a factor in urban areas because of higher poverty rates.
Dependent on poverty levels, crime is more of a factor in urban areas.

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