The species that are likely to be extinct in some time or are at the urge of extinction or endangered species are of much concern because if no active conservation plan is not allowed then this will lead to their extinction.
The preserve land should be priorly decided in order to preserve both species and the surrounding ecosystem including terrestrial and aquatic ecosystems.
Ex-situ Conservation– In this, the threatened animals and plants are taken out from their natural habitat and placed in a special place where they are protected with special care. Example: Zoological parks, botanical gardens, wildlife safari parks, Seed banks.
In situ conservation- In this, conservation and protection of the whole ecosystem are done, its biodiversity is protected at all levels. This approach is called in situ (on-site) conservation. Example- biosphere reserves, national parks and sanctuaries, and sacred groves.
Among the given options, Sacred grooves, hot spots, national parks, biosphere reserves all are in-situ conservation types. And wildlife safari parks and seed banks both are types of ex-situ conservation.
Hence, the correct answer is option “A” – a and b are correct.