The correct answer is option 'B', which includes orchards, botanical gardens, and wildlife safari parks as ex-situ conservation strategies. Here is an explanation of why these options represent ex-situ conservation strategies:

1. Orchards: Orchards are areas where fruit trees are cultivated and managed. In the context of ex-situ conservation, orchards can be used to conserve and protect endangered or rare fruit tree species. By growing these species in orchards, their genetic diversity can be preserved, and they can be protected from extinction.

2. Botanical gardens: Botanical gardens are institutions that cultivate and display a wide variety of plants for scientific, educational, and conservation purposes. They often have collections of rare and endangered plant species, which are maintained and protected to prevent their extinction. Botanical gardens also play a crucial role in research, education, and public awareness regarding plant conservation.

3. Wildlife safari parks: Wildlife safari parks are large areas of land where animals can roam freely in a natural or semi-natural environment. These parks provide a protected habitat for various wildlife species, including endangered ones. By establishing and managing wildlife safari parks, conservationists can ensure the survival and well-being of these animals, while also offering visitors the opportunity to observe and appreciate wildlife in a controlled setting.

Ex-situ conservation refers to the preservation and protection of species outside their natural habitats. It involves removing a species or its genetic material from its original habitat and placing it in a controlled environment where it can be managed and protected. These strategies are particularly important for species that are critically endangered, have small populations, or face significant threats in their natural habitats.

Other options mentioned in the question, such as cryopreservation, sanctuaries, zoological parks, hotspots, and biosphere reserves, are also important conservation strategies but do not fall under the category of ex-situ conservation.

- Cryopreservation: Cryopreservation involves freezing and storing the genetic material of organisms, such as seeds, embryos, or sperm, at extremely low temperatures. This technique is used to preserve the genetic diversity of species and can be a useful tool in ex-situ conservation, but it does not involve maintaining living organisms outside their natural habitats.

- Sanctuaries: Sanctuaries are protected areas that are designated for the conservation of specific species or habitats. They are usually established within the species' natural range and aim to provide a safe and undisturbed environment for the species to thrive. Sanctuaries are part of in-situ conservation, as they focus on protecting species within their natural habitats.

- Zoological parks: Zoological parks, also known as zoos, are facilities where live animals are kept for public display, education, research, and conservation purposes. While zoos may have conservation programs and contribute to the protection of endangered species, they are primarily focused on in-situ conservation, as they maintain animals in captivity rather than in a natural environment.

In summary, ex-situ conservation strategies involve preserving and protecting species outside their natural habitats, and the options listed under option 'B' - orchards, botanical gardens, and wildlife safari parks - represent such strategies.

Ex-citu conservation means conservation of animals or plants in out of their birthplace.