Answer:
It would be an ecosystem. The ecosystem is a biotic community in which living organisms such as plants and animals interact with the non-living components of the environment such as sunlight, water, soil, rocks, etc.
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Carbon forms the key component for all known life on Earth. Carbon is the basis of all molecules. Its is easily able to bond because of the 4 valence electrons.
1. Testing only one variable
A controlled variable means its the one that stays the same. In a controlled experiment, it means there is only one manipulated, (changed) variable.
Answer:
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