Oxygen is the most important factor for living things.
Water because most living things depend on it.
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The most important part of an ecosystem is the living things in it.
The most important part of an ecosystem is the living things in it.
water
oxygen
oxygen and carbon dioxide are the 2 most important gases for living things
Water; all living things require some water.
water or H2O
no
The most important parts of climate for most living things would be temperature and precipitation. This is because some organisms need water to live or a certain temperature.
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