how might a decline in the number of frogs affect other species in an ecosystem use the term food chain in your explanation

Answer: No food for other animals

Explanation: The decline of frogs in a food chain is highly bad for an ecosystem, for one main reason because other species eat frogs and they won't have any frogs to eat. Therefore other species are forced to eat more of another as opposed to frogs, and if not then they might end up becoming extinct.