Which of the following countries are all part of the same geographic region?

The countries listed in the choice of Pakistan, India, Nepal, and Afghanistan are all located in South Asia, making this group part of the same geographic region. This area shares significant cultural, historical, and socio-economic ties, as well as similar physical geography characterized by the Himalayan mountain range to the north and extensive river systems like the Indus and Ganges. All these factors contribute to a distinct regional identity that encompasses diverse cultures, languages, and traditions unified under the broader classification of South Asian geography.

In contrast, the other groups include countries that are more geographically diverse and do not collectively belong to the same region. Brazil, Chile, Peru, and Argentina, while all in South America, are not tightly interrelated in terms of geography compared to the South Asian nations. Canada, the USA, Mexico, and Cuba represent North America and the Caribbean, which are distinct in terms of cultural and economic influence. Finally, Germany, France, Belgium, and the Netherlands, while part of Europe, also diverge geographically and culturally, with different languages and historical contexts affecting their regional cohesion.