Correct Option (A)
The passage highlights the significant risks associated with monoculture, such as vulnerability to single diseases or pests, which can severely impact global food production. It further explains that climate change exacerbates these risks through phenomena like increased flooding, droughts, and the spread of crop diseases. Given the projected substantial increase in global food demand by 2050, the passage implicitly argues for a strategy that builds resilience against these threats. Preserving crop genetic diversity directly addresses the fragility of monoculture by providing a broader genetic base, enhancing adaptability to environmental changes, and offering natural resistance to pests and diseases. This approach serves as a crucial insurance mechanism to safeguard food security in the face of climate change and agricultural vulnerabilities.
Incorrect Options:
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Option (B): The passage explicitly details the "great risks" of monoculture, presenting it as a vulnerable system rather than the sole method for ensuring food security. Its central theme is a critique of monoculture's inherent dangers, especially when compounded by climate change, thereby implying the need for alternative or more resilient agricultural practices.
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Option (C): The passage does not mention genetically modified crops (GMCs) or suggest them as the exclusive solution to impending food shortages. While GMCs may offer certain advantages, the passage's focus is on the systemic risks of monoculture and the broader implications of climate change on agricultural stability, without proposing a specific technological solution.
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Option (D): While Asia and North America are cited as examples of regions that will experience climate change impacts on farmlands, the passage's primary message is not to identify the "worst sufferers" regionally. Instead, it uses these regional examples to illustrate the widespread nature of the risks posed by monoculture and climate change to global food production, emphasizing the need for a fundamental shift in agricultural strategy rather than a geographical focus.