What is a common cause for the development of a lake bed?
paralysis thunder and lightning flowing river erosion rainfall flooding Sediment fulmination
A B C D E F G H
Most of the valley floors are old lake beds.
Lake beds were often formed by a flowing river.
What is a common cause for the development of a lake bed? (A) paralysis (B) thunder and lightning (C) flowing river (D) erosion (E) rainfall (F) flooding (G) Sediment (H) fulmination