You are presented with the quiz "what gets deeper and wide from erosion?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "erosion causes a river to become deeper and wider" and "major rivers include the Severn, Thames and Trent". So, what's the best answer to the question?
Options:
[1]. meters
[2]. form sand
[3]. soil
[4]. Thames
[5]. mountains
[6]. flooding
[7]. Roads
[8]. Sediment
Answer:
[4].