A food chain shows the sequence of organisms in a habitat that are dependent on the one before as a source of food. So in a woodland, one food chain would be grass at the bottom, which is eaten by rabbits, which are then eaten by foxes. The arrows represent the energy flow through the chain. A food web shows all of the interconnected food chains in an ecosystem, and are much more complex. In every food chain, there are trophic levels. All organisms in a particular trophic level are the same numb