Write short notes on any three of the following each with two or three important points :
(e) Ecosystem

Explanation

An ecosystem is a basic functional unit that includes the whole community in a given area (biotic component) interacting with the abiotic factors.
Ecosystem ls normally an open system because there is a continuous gain and loss of energy and materials from this system.
The term .ecosystem. was first used by AG Tansley in 1935 to describe the whole complex of organisms living together as sociological units and their habitats.