Answer:
Option D, the introduction of alien species to an area outside their normal range
Explanation:
The aim of conservation biology is
a) To protect Plant and animal species and their habitats
b) Preserve the resources as they are required for an efficient biotic system
c) Preserve the endangered species
“Introduction of an alien species to an area outside their normal range” may not effect the area under a conservation biologist but it may not be good for the functioning of ecosystems outside their range. In nutshell, "introduction of alien species to an area outside their normal range" seems to be a destructive step and thus it can not come under the practice of "Conservation biology"
Therefore, Option D is the right choice for this question.
