What is loess, which played a crucial role in early Chinese agriculture?

A type of hardened clay used for building early structures

A seasonal monsoon wind that brought heavy, predictable rains

A fine, fertile, dustlike soil carried by wind and deposited by rivers

A special irrigation tool designed for watering crops on terraced hills

What was the primary agricultural benefit of the Huang He's annual flooding?

It cleared the land of trees and rocks.

It deposited a layer of fertile loess.

It filled irrigation canals for the year.

It washed away pests from the fields.

Unpredictable and destructive floods

Constant raids from nomadic horsemen

Volcanic eruptions from nearby mountains

The rivers provided the only source of drinking water in a vast desert.

The valleys offered natural protection from seasonal typhoons.

The river floods created exceptionally fertile land for farming.

The mountain passes near the rivers were important for trade.