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2. The biosphere is the largest ecosystem because it is
made up of the Earth and all living thing inhabit in it.
Producers:
Living things porduce their own food from sunlight,
water and mineral salts from the soil.
Consumers:
Living thing eat other living things (animals).
Primary consumer are animals eat plants (herbivores as
rabbit).
Secondary consumer are animals eat herbivores animals
(owls, foxes).