Simple Explanation
Fertile agriculture rural livelihoods देती है जबकि port trade, transport and industries urban jobs create करते हैं। दोनों economic bases मिलकर large and diverse population support कर सकते हैं। इसलिए चौथा विकल्प सही है। यह example multiple favorable factors के combined effect को दिखाता है। परीक्षा में population concentration के लिए single factor के बजाय complementary factors को पहचानें। / Fertile agriculture provides rural livelihoods while port trade, transport, and industries create urban employment. Together, these economic bases can support a large and diverse population. Therefore, the fourth option is correct. The example shows the combined effect of multiple favorable factors. In examinations, identify complementary factors rather than relying on a single explanation for population concentration.
