The diagram illustrates the transfer of energy within an ecosystem. Which row correctly fills boxes $1$, $2$ and $3$?
- A$1$ herbivore, $2$ carnivore, $3$ decomposer
- B$1$ carnivore, $2$ herbivore, $3$ decomposer
- C$1$ decomposer, $2$ carnivore, $3$ herbivore
- D$1$ carnivore, $2$ decomposer, $3$ herbivore