Simple Explanation
Fertile river plain water, fertile soil और level land के कारण intensive agriculture support कर सकता है। इससे rural livelihoods और dense settlements विकसित हो सकते हैं। इसलिए तीसरा विकल्प सही है। Ice sheets, rocky highlands और dry desert cores generally agriculture के लिए difficult होते हैं। परीक्षा में river plains को dense agricultural population से जोड़कर समझें। / A fertile river plain can support intensive agriculture because of water, fertile soils, and level land. This can support rural livelihoods and dense settlements. Therefore, the third option is correct. Ice sheets, rocky highlands, and dry desert interiors are generally difficult environments for agriculture. In examinations, connect river plains with dense agricultural populations.
