Read this passage from a rhetorical text.

The backyard of a city apartment building is not the first place one might expect to find a chicken coop, but so-called "urban farming” has caught on in recent years as people embrace the benefits of eating local. However, raising backyard chickens can be a significant health risk for the surrounding community. Cities need to relearn the lessons of the early 20th century and ban the raising of chickens in urban settings.

What rhetorical element does the passage most clearly show?

evidence
a call to action
a counterargument
a claim