Correct Option (B)
The passage explicitly identifies "price-affordability by the poor in the developing world" as a global issue requiring global solutions for food security. Therefore, improving price affordability is a fundamental solution. Additionally, the passage states that "Food production, marketing and prices... have become global issues that need global thinking and global solutions." Regulating the conditions of marketing directly addresses the challenges within the marketing aspect of food supply, which the passage highlights as being under strain and needing global attention.
Incorrect Options:
Statement 1: The passage does not mention "setting up more agro-based industries" as a fundamental solution to the world food security problem. Its focus for global solutions is on issues like affordability and marketing conditions.
Statement 4: While the passage emphasizes addressing the lack of purchasing power among the poor and ensuring affordability, it does not advocate for providing food subsidy to "one and all" as a fundamental solution. The emphasis is on targeted affordability for the vulnerable populations rather than universal subsidies.