The image below represents a phenomenon widely recognized around the world, particularly in poorer and developing countries, known as 'Brain Drain.'


(Source: https://4.bp.blogspot.com/-KvIwfjxiZu4/V6KAlfPrSYI/AAAAAAAAAAM/ya3cGDKxfrc7LodtbR8qSQAtOTyGmhlgCLcB/s1600/maxresdefault.jpg, retrieved on 23rd Sep, 2024)

Choose the alternative which CORRECTLY explains the meaning of 'Brain Drain', according to the image above.