The correct answer is option 1, William Gaud. The term "Green Revolution" was coined by William Gaud, an agricultural economist, in the 1960s. The Green Revolution refers to a series of agricultural advancements and practices that resulted in increased crop production and improved food security. Gaud used this term to describe the efforts being made to develop and promote new, high-yield varieties of crops, along with the use of modern agricultural techniques such as irrigation, mechanization, and the application of chemical fertilizers and pesticides. This agricultural transformation had a significant impact on increasing crop yields and helping to alleviate hunger and poverty in many developing countries.