WORLD CIVILIZATION

Detailed explanation-1: -The first civilizations appeared in major river valleys, where floodplains contained rich soil and the rivers provided irrigation for crops and a means of transportation.

Detailed explanation-2: -Historically the first great civilizations all grew up in river valleys. Historians identify the four RVC as the first great civilizations of the world. They are the Tigris Euphrates River Valley, the Nile River Valley, the Indus River Valley, and the Huang-He River Valley.

Detailed explanation-3: -Solution: In the early ages of human existence, the greatest civilisations existed near the river valleys. The rivers acted as a reliable source of water for agriculture and other human needs. The land beside the river was very fertile which facilitated agriculture, hence fulfilled the need of surplus food.