Vertebrates is the answer
Sediment. So the river picks up sediment when it is moving quickly and deposits it when it slows down (or when there is a bend in the river).
I'd have to go with the first option, stags have more prominent antlers than does
Animals move from place to place because -
1)in search of food and shelter.
2)to <span>protect themselves against adverse climatic conditions.
3)to protect themselves </span><span>from enemies and their predators
</span>4)to find suitable partners for <span>reproduction.
Animals migrate to reproduce, eat, or seek warmer climates.</span>
