Explanation: A food chain refers to the feeding relationships between species in a biotic community. In a food chain, the series of organisms is dependent on the next as a source of food.
A food web refers to a diagram showing the organisms that eat other organisms in a particular ecosystem, predators being higher in the web than their prey. In a food web, there's an interconnection of food chains and a graphical representation of what-eats-what.
An organism that feeds at the top of a food chain is more vulnerable to ecological collapse because of the depletion of a particular feeding population than one that feeds at the top of a food web.
