The correct option is B Wildlife safari parks
Ex situ (off site) conservation
Ex situ (off site) conservation is the approach of conserving species by taking them out from their natural habitats and then keeping them in a special setup under human care.
Biodiversity hotspots
Biodiversity hotspots are regions on Earth with a high density of biodiversity, especially containing species that are endemic to that region. It is an in-situ conservation method.
Amazon rainforests
Amazon rainforests are the natural habitats of a large number of species. Their conservation is included in in-situ conservation because species are conserved in their natural habitats.
Himalayan region
The Himalayan region is a biodiversity hotspot present in India. This includes the entire Indian Himalayan region (including the areas in Pakistan, Tibet, Nepal, Bhutan, China. Since this a hotspot it is an in situ method of conservation.
Wildlife safari parks
Wildlife safari parks are large enclosed areas where wild animals like lions, tigers, etc live freely. It looks like a zoo that can be visited by a drive-through. This method of conservation comes under the ex situ approach of conservation.