I believe it is the retina that changes shape to focus on distant objects.
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An ecosystem is a self supporting system in which there is a flow of materials and energy.
<h3>What is an ecosystem?</h3>
An ecosystem is a self supporting system in which there is a flow of materials and energy.
Let us now see the role of each organism in the small ecosystem.
- flower - producer
- butterfly - primary consumer
- bird - secondary consumer
- earthworm - decomposer
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Species could compete for water, food, land, etc.