I. Complete the article. Use the passive form of the verbs in the box allow call can / understand define write determine fight may / divide rear Thousands of books (0) ....have been written….. about the territorial instinct of animals. Humans are territorial too and when we understand this, some kinds of aggressive behaviour (1) ………………………….…………. more easily. Every country is a territory with boundaries which (2) ………………………….…………. usually clearly ……………………………. Within each country there are smaller territories: counties and cities. Throughout history wars (3) ………………………….…………. by people protecting the territory in which they live. However, there are other kinds of territory as well. One such territory (4) ………………………….…………. “personal space”. For animals, the size of this space depends on the conditions in which the animal (5) ………………………….…………., whether in the wild or in a zoo. For humans, it depends on the density of the population in the place where they grew up. To some extent, the size of an individual’s personal space (6) ………………………….…………. by their culture. Personal space (7) ………………………….…………. into four zones: the intimate, personal, social and public zones. The intimate zone extends fifteen to forty-five centimetres from the body. Only close friends and relatives (8) ………………………….…………. to enter the intimate zone. If a stranger enters it, the individual becomes anxious and may feel threatened. Các bạn giúp mình với đi nhaa:3