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(a) What is an ecosystem? List its two main components. (3)(b) We do not clean ponds or lakes, but an aquarium needs to be cleaned regularly. Explain.



Eco system is a place where all organisms live in safe.
Because in aquarium there are aquatic organisms live such as fish, octopus and frog etc for there survival we should clean it.
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Answer of (a) second part.. -

Main components of ecosystem - Biotic and Abiotic..
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