Which combination is central to the Green Revolution in increasing cereal production?

• A. High-yield varieties, chemical fertilizers, irrigation
• B. Terracing and slash-and-burn
• C. Livestock breeding
• D. Subsidized seeds only

Answer: (A)

The central idea is that boosting cereal production relied on using improved, high-yield varieties together with the inputs that let those varieties perform—chemical fertilizers to supply essential nutrients and reliable irrigation to ensure water and enable multiple cropping. This combination dramatically increases yields per hectare, allowing more food to be produced on the same land and helping to address hunger in many developing countries during the mid-20th century. The other options miss this crucial mix: terracing and slash-and-burn are traditional land-management methods not tied to the input-driven yield gains of the Green Revolution; livestock breeding focuses on animals rather than cereals; and subsidized seeds alone don’t deliver higher yields without sufficient fertilizer and irrigation.