(a) State one advantage of using jute bags over plastic bags for shopping.(b) Write a common food chain of a pond ecosystem having four links.
(a) Jute bags should be used for shopping because they are biodegradable whereas plastic bags are non-biodegradable.
(b) A common food chain of a pond ecosystem having four links is shown below:
$Algae → Protozoa → Small Fish → Big Fish$
(Producer) (Herbivore) (Carnivore) (large carnivore) 
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