Passage Summary: Worms prefer neutral dirt, but dead plants make the surface acidic; therefore, adding alkaline limestone to the top should fix the acidity and attract more worms.

Conclusion: Putting crushed limestone on the surface of the soil will make the environment more appealing to earthworms.

Reasoning: Earthworms like neutral soil, and since rotting plants make the top layer of soil acidic, adding alkaline limestone should help balance the pH.

Analysis: The argument relies on a physical connection that hasn't been explicitly stated. It assumes that limestone applied to the 'surface' will actually interact with the acidic 'top layer' in a way that benefits the earthworms. If the limestone just sits on top without neutralizing the acidity where the worms actually live or travel, the plan fails. Look for an answer that confirms the limestone will effectively neutralize the acidity in a way that matters to the worms' environment.