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Question

An ecosystem requires only one external input and that is

A
Soil
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B
Water
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C
Solar energy
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D
Air
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Solution

The correct option is C Solar energy
An ecosystem requires only one external input that is solar energy. Water, air and soil are abiotic components of the ecosystem. Ecosystems are made up of both biotic and abiotic components, therefore these factors are part of the ecosystem.

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