Passage Summary: People use fertilizers that only have three main nutrients, but soil needs more than that to stay healthy. By raking their lawns, people are actually taking away the extra minerals the soil needs.

Reasoning: Commercial fertilizers only provide macronutrients, but soil needs both macronutrients and micronutrients for long-term health. Raking up grass clippings removes micronutrients from the soil.

Analysis: In this Must Be True scenario, we are looking for a synthesis of the provided facts. We know that long-term soil health requires micronutrients, and we know that raking clippings removes those micronutrients. Since commercial fertilizers don't replace them, a lawn that is both raked and only treated with these fertilizers will eventually run out of the micronutrients it needs. Look for an answer choice that connects the act of raking and the limitations of commercial fertilizer to a decline in long-term soil health.