'अफ़्रीकानर्स' (Afrikaners) शब्द किस जनसमूह को संदर्भित करता है?

Snow houses (igloos) are typically found in regions:

For historical indigenous populations who lived in rugged terrains like the Andes and the Himalayas, mountain journeys were primarily:

Which of the following reasons is primarily responsible for the phenomenon of 'brain drain'?