Ecosystems - are made up of living (biotic) and non-living (abiotic) things that interact with each other., Feeding relationships - can be shown through food chains and food webs., A food chain - shows who eats whom in an ecosystem. It describes the feeding relationship between organisms., The arrows in a food chain - indicate the direction of energy flow., Energy in a food chain starts - with the sun, Plants (producers) - capture energy from the sun through photosynthesis and convert it into chemical energy.,

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