Which reason best explains the growth of ancient settlements in river valleys?

Correct answer: Water, fertile soil and movement facility

Direct answer: A, water, fertile soil, and movement facilities. Ancient settlements needed dependable water for drinking, animals, household activities, and irrigation. Rivers also deposited alluvial material that often made nearby land fertile, supporting crops and food surplus. The river valley could further provide a route for walking, boating, exchange, and communication, although the exact benefit varied by river and season. The reasoning is therefore: water supports life; fertile soil supports agriculture; easier movement supports trade and contact; together these encourage permanent settlement and civilization. Option A is correct because it combines the three main practical advantages. Option B is wrong because permanently icy land is generally difficult for farming and settlement. Option C is wrong because the spread of dense deserts means lack of water and harsh living conditions, not a major settlement advantage. Option D is wrong because abundant volcanic ash is not the general reason for settlements in river valleys and may create hazards; it is also not a normal feature of all river valleys. Memory cue: river valleys offered “water, food, and routes.”