Answer:
(a) An ecosystem consists of all species of plants and animals in a given area which are interdependent on each other. (b) It is the ecosystem which helps the man to survive and lead a comfortable life. It provides man with food, raw material for industries and clothing. The natural resources should be used carefully so that they are not exhausted in a short time. Ecosystem can be conserved by avoiding indiscriminate cutting of trees. Checking on rapid growth of population, otherwise overcrowding will result in many imbalances and pollution of environment.
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