Answer:
Carbon Dioxide
Explanation:
google plus proof below I guess
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Autotrophs- include plants, algae, and cyanobacteria and are photosynthetic organisms. Heterotrophs- are consumers that get energy by feeding on autotrophs. Both use organic molecules produced by photosynthesis as a source of building blocks for growth and repair and as a source of chemical energy for cellular work.
Established of a community in an area of bare Rock or bare sand where no topsoil is present