The correct answer is option 1: Blue revolution. The Blue revolution refers to the fish farming revolution. This term is used to describe the significant increase in fish production through aquaculture, which involves raising fish in tanks, ponds, or other controlled environments. The Blue revolution has played a crucial role in meeting the growing demand for seafood and reducing pressure on wild fish stocks. It has also contributed to economic development and improved food security in many countries. The term "Blue revolution" is derived from the color of water and its association with fish farming. Other color revolutions such as White revolution (refers to dairy production), Yellow revolution (refers to oilseed production), and Brown revolution (refers to leather production) are unrelated to fish farming.