We are witnessing a dangerous dwindling of biodiversity in our food supply. The green revolution is a mixed blessing. Over time farmers have come to rely heavily on broadly adapted, high yield crops to the exclusion of varieties adapted to the local conditions. Mono cropping vast fields with the same genetically uniform seeds helps boost yield and meet immediate hunger needs. Yet high-yield varieties are also genetically weaker crops that require expensive chemical fertilizers and toxic pesticides. In our focus on increasing the amount of food we produce today, we have accidentally put ourselves at risk for food shortages in future.

Correct Option (D)

The passage critically evaluates the Green Revolution, describing it as a "mixed blessing." It highlights that while the adoption of broadly adapted, high-yield crops and monocropping has boosted immediate food production, it has simultaneously led to a "dangerous dwindling of biodiversity in our food supply." The passage explicitly states that this focus on increasing current food output has "accidentally put ourselves at risk for food shortages in future." Therefore, the most logical and critical inference is that the Green Revolution, despite its immediate benefits, can pose a significant threat to both biodiversity in the food supply and long-term food security.

Incorrect Options:

Option (A) is incorrect because while the passage notes that high-yield varieties "require expensive chemical fertilizers and toxic pesticides," implying a dependency linked to the Green Revolution, it does not assert that this is the "only" reason for such reliance in agricultural practices. The term "only" makes this statement an overgeneralization not fully supported by the passage.

Option (B) is incorrect. The passage describes monocropping with high-yield varieties as a practice employed due to the Green Revolution's approach to boosting yield. However, stating that it is "possible due to green revolution" is a descriptive fact mentioned within the passage, not the most critical or overarching inference regarding the Green Revolution's long-term implications or warnings, which is the focus of the question.

Option (C) is incorrect. The passage explicitly contradicts this statement. While it acknowledges that monocropping "helps boost yield and meet immediate hunger needs," it immediately follows this by warning that such practices "put ourselves at risk for food shortages in future." This indicates that monocropping is not the "only way" to ensure food security; rather, it is presented as a method that, in the long run, can undermine it.