Relacionar Columnas Stages of a river.Versión en línea Match the points por Valeria Montiel Delgado 1 The Mouth 2 Upper Course 3 Source 4 Middle Course 5 Lower Course When the water flows slowly through landscapes that are less steep, forming a flood plain. In this final stage the river flows slowly and deposits the rocks that it has dragged along with it and forms curves called meanders