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.
The Ottoman Empire, empire created by Turkish tribes in Anatolia (Asia Minor) grew to be one of the most powerful states in the world during the 15th and 16th centuries