Fact 1: Spores may be dispersed by moving water, wind, or other organisms.

Fact 2: Plastic and other mulches offer a barrier to spore dispersal.

Given the two facts above, answer the question "Plastic and other mulches offer a barrier to what?" with the following options: 
- contamination
 - Animal survival
 - erosion
 - Deposition.
 - spores moving
 - bacteria
 - environment
 - high temperature


 

     spores moving    