Read the following four summaries of the original text and decide which one retains the main idea with vocabulary and structure changes. Original text: In every corner of the globe, aboriginal and traditional cultures are slowly disappearing. From the 18 th century, the process of industrialization and settlement of new people had a dramatic effect on aboriginal groups such as the Australian Aborigines, the Teleut people of Siberia and the Ainu of Japan. These traditional cultures have survived for hundreds, sometimes thousands of years and languages, music and other customs display a rich and wide variety of human culture. Yet these cultures risk being lost forever, as the old ways gradually die out and are replaced by more modern, industrialized lifestyles.