4.4

+ Trophic = to feed.

+ Carrot plant -> carrot fly -> fly catcher -> sparrow

= photosynthesis -> Herbivore -> Carnivore -> Carnivore (bigger)

= producer (Light energy -> Chemical energy) -> Primary consumer (C.e -> C.e (different form)) -> secondary consumer (C.e -> C.e (different form)) -> Tertiary consumer (C.e -> C.e (different form))

+ Eventually all these stages will die which leaders to their decomposition.

+ Some decomposers would include: Fungi and bacteria, breaking down molecules such as Nitrate and Phosphate.