You are presented with the question "What can cause plants to die?" and the following answer choices: 
- Planting flowers
 - Winter
 - Pollution
 - Condensation
 - Photosynthesis
 - Sulfur
 - coal
 - bacteria

Now knowing that changes in the pH of soil can cause plants to die and sulfur lowers pH in soil, choose the best answer.


 

      Sulfur   