Learn about the food chain with a simple definition, clear diagram, and real-life examples. Understand how energy flows in nature. Food chain explained for kids with parts, types, examples, and a simple diagram. Learn how energy flows through its different levels. A food chain is a linear sequence of organisms where nutrients and energy are transferred from one organism to another through consumption. One way to show how living things are related to each other in an ecosystem is based on what they eat. What is a Food Chain ? A food chain is a simplified model of the flow of energy and nutrients through an ecosystem, which tells you about the food relationships between different organisms. Every organism lives at a specific trophic level, depending on ... A food chain shows the way organisms create and feed off food in order to survive. Learn more and take the quiz!