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1. Eco system and its types- 2. Biosphere a. Lithosphereb. Hydrospherec. Atmosphere3. Components of biospherea. Biotic componentsb. Abiotic components4. Types of eco systemsa. Terristerial, land , forestb. Aquatic flowing water, rivers, streams etcc. Aquatic stagnant water, lake, pond, etcd. Artificial eco system, parks, kitchen gardense. Forest ecosystem, producers ( trees, shrubs, herbs); consumers ( herbivorous, ants, flies); carnivorous ( snakes ,.; decomposers( algae, fungi, bacteria)