What role do animal preserves play in maintaining ecosystem biodiversity?

Animals preserve play very important role in maintaining ecosystem biodiversity. In animal preserves, animals are protected from the harmful effects of the changes which occur in the environments due to human intervention. In animal preserves,

animals should be kept in proper environment and provide a proper place for living and food in order to increase the population of the animals.

answer; i believe the correct answer is (replication is not conservative);