You are presented with the question "What can soil have a positive impact on?" and the following answer choices: 
- nutrients
 - organic molecules
 - consumers
 - healing of wounds
 - water conservation
 - important habitats
 - watershed
 - Most plants

Now knowing that zinc has a positive impact on the healing of wounds and sources of zinc are soil, zinc oxide, zinc sulfate, zinc chelate, choose the best answer.


 

    healing of wounds     