Rats are prey to larger animals, predators to some birds and smaller mammals, and are also scavengers. Decomposer is not the right term to use. This term is more used for fungi and some bacterial colonies.
It is a preditor
Its predator not preditor
Both.
Both.
A shark is both prey and predator
both it a preditor and prey
Bunnies are prey - to eagles, foxes and snakes.
preditor
both preditor and prey
is the giardia a preditor or prey
it might as well be snails
A snow leopard is a preditor