A food web is a more realistic model of energy flow than a food chain, because -
• The food chain describes a single linear sequence of energy flow which requires specific group of species to accomplish the energy flow in the real life.
• But, in the practical situation, these specific sequence doesn't occur in most of the times.
• On the other hand, the food web randomly connects different food chains through infinite number of completely random sequences.
• These random sequences are more practical because the existence of the species is also random which makes the energy flow sequence more complex, as described in the food webs.
• For this reason, the food webs are more practical.
