You are presented with the question "Plastic and other mulches offer a barrier to what?" and the following answer choices: 
- contamination
 - Animal survival
 - erosion
 - Deposition.
 - spores moving
 - bacteria
 - environment
 - high temperature

Now knowing that spores may be dispersed by moving water, wind, or other organisms and plastic and other mulches offer a barrier to spore dispersal, choose the best answer.


 

     spores moving    