How can we study the Himalayas with its diverse ethnic groups, languages

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How can we study the Himalayas with its diverse ethnic groups, languages

1) How can we study the Himalayas with its diverse ethnic groups, languages and religions as an area of study?

2) What are the sources of images of Tibet as Shangri-la?

3) Who are the Gurkhas?

Choose one of these topics( 1500-2000 words)