Choose the correct option to complete the text. There are two extra words.

The population of gorillas living in the ... is in decline. Scientists believe that ... to their survival include the destruction of the forests in which they live. Moreover, gorillas are hunted for their meat, so in order to stop ... scientists create special places to protect the animals. These places are called ... . There are also ... programmes in zoos around the world. However, some people are against keeping such intelligent animals in ... . Gorillas are endangered animals, but for the time being they do not face ... .