वॉन थ्यूनेन के कृषि अवस्थिति मॉडल में 'समदैशिक तल' (Isotropic surface) की अवधारणा का तात्पर्य निम्नलिखित में से किसकी एकरूपता से है?

Consider the following statements regarding Quaternary Activities: 1. These activities involve the collection, production, and dissemination of information. 2. They are tied to resources, affected by the environment, or necessarily localized by the market. 3. These activities center on research and development. 4. Like some tertiary functions, quaternary activities cannot be outsourced. Select the correct answer using the codes given below:

Where are the world's major commercial fishing grounds predominantly located?