While omnivorous, and not particularly picky in general, rats show a preference for fruit and nuts and can be considered primary consumers in this regard. As said, they will eat invertebrates and other vertebrates too so are secondary consumers in that regard.
no
No. It's a primary consumer. The producer is the grass and leaves it eats.
secondary consumer
given the only two choices it must be a consumer
It is a consumer. It eats grass
primary
It is a primary consumer.
a primary
is a rat a primary consumer or a secondary consumer or a primary consumer
primary
primary
primary consumer