There are many animal that have become extinct in the wild but continue to be maintained in Zoological parks

There are many animal that have become extinct in the wild but continue to be maintained in Zoological parks.
(i)What type of biodiversity consservation is observed in this case?
(ii) Explain any other two ways that help in this type of conservation.

(i)It is an example of ex-situ conservation. In this approach, threatened plants and animals are taken out of their natural habitat and placed into suitable settings and given special care.
(ii) Cryopreservation and tissue culture are two ways that help in ex-situ conservation.In cryopreservation.gemetes of threatened species are preserved in viable and fertile conditions at subzero temperatures, which helps in preserving these cells for longer periods.
In tissue culture, plants are propagated from a small mass of tissue called callus.