भारत के सबसे बड़े जनजातीय समुदायों में से एक 'गोंड' जनजाति मुख्य रूप से किस भौगोलिक क्षेत्र में स्थित है?

In traditional anthropological classification of human races, which racial group was characterized as 'yellow-skinned'?

What is the approximate estimated proportion of ecumene (habitable) and non-ecumene (uninhabitable/sparsely inhabited) areas on the Earth's surface?