yes
no
Yes, a river is bigger than a brook.
No. There is no animal that can eat something bigger than itself. A king snake has a stomach and it has limits.
A fish
The Tennessee River.
Yes, "Snake River" is a common noun because it refers to a specific river rather than a unique entity.
The grass snake is pretty small but the smallest snake in the world is the thread snake it is no bigger than a quarter.
mississippi
it has big jaws
A valley is quite bigger than a river
because the California king snake is bigger than the rattle snake so it can just gulp it down.
ganga is bigger than godavari in length.