Correct Option (2)
The passage primarily conveys that centuries of selective breeding have resulted in genetically refined crops that, while optimized for current conditions, possess reduced genetic diversity. This lack of variation makes them highly susceptible to new or evolving agricultural diseases, especially under changing climatic and atmospheric conditions. The central concern articulated is that a heavy reliance on such genetically uniform crops introduces a significant risk of widespread crop failure, thereby threatening food security. Option 2 directly captures this core idea by linking the dependence on genetically honed crops to the potential for food insecurity.
Incorrect Options:
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Option 1: While the passage acknowledges that global climate change can adversely affect crops, its central idea is more specific. It focuses on the mechanism of impact, specifically the heightened vulnerability of genetically honed crops to diseases due to their lack of genetic diversity, rather than a general statement about productivity decline.
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Option 3: The passage discusses the vulnerabilities within agricultural practices, particularly concerning genetically honed crops. It does not broaden the scope to suggest that food security strategies should extend beyond agricultural productivity or diversify into non-agricultural domains.
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Option 4: The passage highlights the risks associated with genetically honed crops due to their limited genetic variation. However, it does not advocate for their complete replacement with wild varieties. It merely points out the inherent vulnerability and the potential for catastrophic outcomes.