Question

what is necessary to convert foodchain into foodweb and why

Answer 1

In other words, a food chain is a sequence of who eats whom in a biological community or an ecosystem to obtain food. A food chain is a way of depicting the flow of energy from one organism to the next and to the next and so on. Everyone needs the energy transmitted through a food chain in order to survive

Answer 2

So, that every living organism could survive. To maintain the biodiversity. So, that to maintain ecological balance.