To solve this problem, we need to identify the type of conservation described in the question.$\newline$The question describes a conservation method where threatened species are removed from their natural habitat and placed in a special setting for protection and care.$\newline$Let's analyze the options:$\newline \bullet$Option 1: Semi-conservative method - This term is not related to conservation of species; it is more commonly associated with DNA replication.$\newline \bullet$Option 2: Sustainable development - This refers to development that meets the needs of the present without compromising the ability of future generations to meet their own needs. It is not a conservation method.$\newline \bullet$Option 3: in-situ conservation - This involves conserving species in their natural habitats. The question describes removing species from their natural habitats, so this is not the correct option.$\newline \bullet$Option 4: Biodiversity conservation - This is a broad term that includes various methods of conserving species, including ex-situ conservation, which involves removing species from their natural habitats for protection.$\newline$The correct answer is Option 4: Biodiversity conservation, as it encompasses the method described in the question.