Researchers have been studying a rare population of 87 voles in an isolated area. Ten voles from a larger population were added to this isolated population. Besides having ten additional animals, what benefits are there to importing individuals

increased genetic diversity      

Explanation:

The addition of 10 voles from another population will result in an increase in the genetic diversity of the population as the alleles in the population becomes more diverse. Additionally, the introduction of the new animals will reduce/reverse any form of inbreeding depression that may have been occurring in the isolated population. Inbreeding depression results from the mating of individuals will very close genetic materials, that is mating between related individuals and this occurs when a small population or organisms are isolated and there is no introduction of new genetic materials.