Relacionar Columnas Stages of a river.Versión en línea Match the points por Valeria Montiel Delgado 1 Middle Course 2 Upper Course 3 Lower Course 4 Source 5 The Mouth 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