(A) South Asia
(B) South Africa
(C) Europe
(D) None of these
🧠 Explanation:
- South Asia, which includes countries like India, Pakistan, Bangladesh, and Nepal, has the highest concentration of people in the world.
- This region is home to over 1.8 billion people, with India and Bangladesh having some of the highest population densities globally.
- Favorable climate, fertile land, and historical civilizations have contributed to dense settlements in this area.
- Compared to Europe, South Africa, or other regions, South Asia has consistently remained the largest population cluster.