UGC NET Questions (Paper – 1)

Statements B, C and D are correct because they show that food security is influenced by climate impacts, sustainable practices and multiple dimensions beyond sheer output. Climate extremes affect yields, sustainable agriculture balances productivity and environmental health and food security includes access and nutrition. Statement A is incorrect since national production alone does not guarantee that people can access or afford adequate, nutritious food. Therefore, the combination that includes B, C and D and excludes A is the correct answer.

Option A:
Option A is incorrect because it leaves out D, which correctly emphasises access and nutritional quality as core components of food security. Restricting the concept to production and climate-impacted yields fails to capture the full meaning of food security.

Option B:
Option B is incorrect as it adds statement A, which wrongly claims that only total national production matters. By including A, this option accepts a narrow and misleading view of food security that ignores distribution and affordability issues.

Option C:
Option C is incorrect because it declares all four statements A, B, C and D to be correct. Since A is clearly false in light of the multidimensional definition of food security, this combination cannot be accepted.

Option D:
Option D is correct because it lists exactly those statements that align with widely accepted definitions of food security and environmental sustainability. It highlights climate effects, sustainable agricultural responses and the multi-dimensional nature of security, while rejecting the simplistic production-only view in A.

The distinction between weather and climate is based mainly on time scale and averaging. Weather describes the conditions of the atmosphere at a given place and time, such as a particular day or week. Climate describes the statistical pattern of weather over a long period, usually thirty years or more. This definition is widely accepted in meteorology and environmental studies, so the statement in option A correctly captures the difference.

Option A:
Option A correctly contrasts short-term variability with long-term averages. It emphasises that daily changes like rain today and sunshine tomorrow belong to weather, while long-term trends like monsoon patterns belong to climate. This understanding is essential when interpreting news about climate change, which focuses on shifts in long-term patterns rather than single events.

Option B:
Option B is incorrect because equating weather and climate ignores their different time scales. If they were the same, one cold day could be used to deny long-term warming trends, which is scientifically wrong. The distinction is fundamental in climate science.

Option C:
Option C is incorrect since both weather and climate include many elements such as temperature, rainfall, humidity, wind and pressure. Limiting weather to temperature and climate to rainfall oversimplifies atmospheric processes and leads to confusion.

Option D:
Option D is incorrect because the difference between weather and climate is not based on which academic discipline studies them. Both geography and physics contribute to meteorology and climatology, and the concepts are defined independently of institutional boundaries.