Read the map. A map titled Physical Features of East Asia. A key shows Lowlands in green, Highlands in yellow, and mountains with brown triangles. China is surrounded by the following countries: India, Pakistan, Afghanistan, Kazakhstan, Mongolia, North Korea, South Korea, Laos, Thailand, and Bangladesh. The map has labels 1 through 4. 1 is a river in Mongolia.
2 is a river in southern China.
3 is a river south of the Qin Mountains.
4 is a river north of the Qin Mountains.
Which number on the map shows the Yangtze River? 1 2 3 4