Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.
In recent years, zoos have come under heavy criticism from animal rights activists. However, the benefits of keeping animals in captivity outweigh the drawbacks. First of all, zoos protect many species that are on the verge of extinction. In captivity, a species can be relatively safe from predators and bred to ensure there is a foundation population. Later, they can be reintroduced into the wild and thrive in their natural habitats. Without zoos, there would be fewer species alive and ecosystems would suffer. Second, zoos can serve educational purposes. While documentaries on TV or the internet can entertain their audience with impressive and detailed depictions of wildlife, the experience is nowhere near as memorable as seeing the animals in real life. Hands-on or close encounters with a variety of animals have a greater impact on visitors and will, hopefully, teach them to appreciate wildlife more and encourage them to be more active in conservation efforts. Finally, zoos play an important role in research. Accredited zoos often receive funds or grants to carry out valuable research on captive animals, and their findings benefit not only captive but wild populations too. Working with captive animals also means there are fewer risks for researchers and fewer variables, which enhances research quality. Thanks to research, we have developed a better understanding of different endangered animal species, from which we can work out practical steps to counter the threats they face. Research, therefore, is crucial to the survival of those species. In summary, although not all zoos are well-equipped and there is always room for improvement, the benefits of zoos prove that they are vital for the conservation of animals and the education of the public.

What can zoos do to develop visitors’ appreciation for wildlife?