The correct option is B in situ conservation
In situ conservation is a strategy which involves the conservation of genetic resources in the natural ecosystem of plant or animal species without taking them to external artificial habitats. Conservation of genetic resources in a forest is an example of this type of conversational strategy. It is the process of protecting the endangered plant and animal species in their natural environment. Wildlife sanctuaries, national parks, and biosphere reserves are some of the methods of in situ conservation.