| Zoos | Hugely popular attractions where animals are kept for public display and entertainment. |
| Critics | People who express negative opinions or objections. |
| Artificial | Not natural; made or produced by humans. |
| Environments | Surroundings or conditions in which something or someone exists. |
| Diversity | A range of different things or variety. |
| Enclosed | Confined or closed off. |
| Deprivation | The state of lacking or being without something. |
| Stressed | Feeling mental or emotional pressure or strain. |
| Mentally ill | Suffering from a mental disorder or illness. |
| Wild | Existing, growing, or living in a natural environment. |
| Relatives | Family members or connected by blood or marriage. |
| Unnaturally | In a way that is not natural or normal. |
| Marine | Related to the sea or ocean. |
| Tricks | Actions or behaviors performed for entertainment or amusement. |
| Mammals | Warm-blooded animals that have hair or fur and produce milk for their young. |
| Suicide | The act of intentionally causing one's own death. |
| Conservation | The protection, preservation, and careful management of natural resources and wildlife. |
| Inspire | To fill someone with the urge or ability to do or feel something. |
| Mistreated | Treated badly or cruelly. |
| Circuses | Entertainment shows that feature performances by trained animals. |
| Abandoned | Left behind or deserted. |
| Behaviour | The way in which someone acts or conducts themselves. |
| Illnesses | Medical conditions or diseases. |
| Endangered | At risk of extinction or disappearance from the wild. |
| Poachers | People who illegally hunt or capture wildlife. |
| Habitat | The natural environment in which an animal or plant species lives. |
| Predators | Animals that hunt, kill, and feed on other animals. |
| Secure | Safe, protected, or free from danger. |
| Genetic diversity | The variety of genes within a population or species. |
| Surplus | An amount or quantity greater than what is needed or used. |
| Circuses | Entertainment shows that feature performances by trained animals. |
| Ranches | Larger farms or properties where livestock is raised. |
| Enclosure | An area surrounded by a fence or barrier. |
| Imprisoning | Keeping someone or something confined or restricted. |