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

Fact 2: An incised wound is a clean cut.

Given the two facts above, answer the question "What kind of impact does zinc have on healing cuts?" with the following options: 
- heat energy
 - lowered energy cost
 - no impact
 - major threat to health
 - it causes infection
 - a positive impact
 - circulatory systems
 - a negative impact


 

      a positive impact   