Gene flow occurs when individuals move into or out of a population, and genetic diversity can be maintained in small populations by even a small amount of gene flow. Given these facts, what can be maintained when individuals move into or out of a population among the following options:
- loose soil
 - vegetation
 - reusing materials
 - important habitats
 - genetic diversity
 - resistance
 - hydration
 - swamp vegetation


 

     genetic diversity    