In an Aquatic Ecosystem, the Aquatic Plants Are Eaten by Small

Multiple Choice

In an aquatic ecosystem, the aquatic plants are eaten by small invertebrates that in turn are eaten by crayfish, which are eaten by fish, which are then eaten by ducks.Based on this, which of the following is incorrectly matched?

A) aquatic plant - producer
B) crayfish - secondary consumer
C) duck - 4th trophic level
D) fish - tertiary consumer
E) small invertebrates - 2nd trophic level