Fact 1: Zinc has a positive impact on the healing of wounds.

Fact 2: Sources of zinc are soil, zinc oxide, zinc sulfate, zinc chelate.

Given the two facts above, answer the question "What can soil have a positive impact on?" with the following options: 
- nutrients
 - organic molecules
 - consumers
 - healing of wounds
 - water conservation
 - important habitats
 - watershed
 - Most plants


 

    healing of wounds     