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When we talk about an ecosystem, ecosystem is consisting of biotic and abiotic factor.
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An ecosystem is made from the interaction between the biotic and the abiotic components.
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Now in the biotic components, organisms, type of organisms found depends upon the abiotic factors.
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So biotic and abiotic factors are interdependent upon each other.
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They are related to each other.
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They are not independent of each other.
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Hence, here in the question, we have been given four options.
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First option is land, farm and soil.
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Second option is temperature and soil.
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Then we have soil and water.
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And the fourth option is water and temperature.
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And we have to find out the paired abiotic factor which is most essential to determine the type of vegetation that is found in a natural ecosystem.
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When we talk about vegetation, basically we are talking about the autotrops or the plants that are...