: The natural depression in the ground where the water flows.
You can use these questions for a "proverochka" (check-up) or self-study: (b) Source (c) Channel Where does a river end? (a) At its source (b) At its mouth (c) At its left bank okruzhaiushchii mir 2 klass reki
: You can find "Parts of a River" diagrams and tests on Infourok or Uchi.ru . : The natural depression in the ground where the water flows