The correct option is C X - Sanctuary, Y - National Park, Z - Biosphere Reserve
X - Sanctuary, Y - National Park, Z - Biosphere Reserve. Sanctuaries mainly focus on the conservation of animals and are set up with the right environment for it. A biosphere reserve is an ecosystem with plants and animals of unusual scientific and natural interest. It is a label given by UNESCO to help protect the sites. They help to promote the management, research and education in ecosystem conservation. This includes the sustainable use of natural resources.