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Question

Which of the following can be considered as an ecosystem?
  1. Coral reef
  2. Lagoon
  3. Pond
  4. All of the above

A
Pond
B
Coral reef
C
Lagoon
D
All of the above
Solution
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An ecosystem is a community where living organisms exist in an interaction with their non-living environment. Coral reefs are the ecosystems built by the tiny coelenterates living in marine waters on the coastal surfaces and are held together with the help of their calcium carbonate structures.
Lagoon is a small water body separated from large water body by means of islands. Lagoons are shallow which show the growth of various plants and also corals.
A pond ecosystem is a type of fresh water ecosystem with the existence of numerous phytoplanktons, zooplanktons and animals.
Thus, the correct answer is option D.

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