Explanation:

• In wildlife sanctuaries, rare and endangered species are encouraged to breed in human controlled environments with restricted settings. This is called as captive breeding.

• This is a successful technique to increase the populations of rare and endangered species of animals. When the populations of such animals are increased through captive breeding in the captivity the animals are safely released into the wild.

• The technique of captive breeding has following advantages –

• It helps to increase the populations of rare and endangered species of animals and to save these animals from extinction.
• The birth rates, hatching rates and survival rates of captivity –produced animals remains much higher than in case of higher bleedings.
• This technique helps us to raise the population of wild animals up to the desired levels.
• This technique is useful in developing desired characters or traits in organisms.

• However, this technique does not ensure the protection of the natural habitat of species.

• Hence option (b) is correct.