. Estuary is the example of


(a)           natural ecosystem.                          

(b)          man-made ecosystem.

(c)           aquarium.                                         

(d)          landmass.

Best Answer

(a)     natural ecosystem.

Estuaries are natural water bodies, which are formed by the input of one or more rivers flowing into it. The estuary generally opens into the sea. They are areas of high biological productivity as most aquatic animals breed here.

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