Correct Answer:
A. Indus Basin
The Indus Basin is unequivocally the most fertile region of Pakistan. This vast plain is irrigated by the Indus River and its numerous tributaries, which deposit rich alluvial soils, making it exceptionally productive for agriculture. It forms the agricultural heartland of the country, supporting a significant portion of its population and food security. In contrast,
- The Thar Desert is arid and infertile.
- The Balochistan Plateau is largely barren and rocky.
- The Karakoram Range is a high-altitude, cold, and mountainous terrain unsuitable for extensive farming.