biotic  - Word for living things in ecosystem, abiotic - Word for non-living things in ecosystem, pond - A pond is an area filled with water, either natural or artificial, that is smaller than a lake, sea - is the body of salty water that covers over 70 percent of the Earth's surface., river - is a natural flowing watercourse, usually freshwater, animals  - are multicellular eukaryotic organisms that form the biological kingdom Animalia., organism - an organism is any individual contiguous system that embodies the properties of life, population - a population is a number of all the organisms of the same group or species who live in a particular geographical area and are capable of interbreeding, community  - is a group of living things sharing the same environment,

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