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The total number of major languages in India are 16.

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Man and the Biosphere Programme (MAB) is an intergovernmental scientific programme, launched in 1971 by UNESCO, that aims to establish a scientific basis for the improvement of relationships between people and their environments.

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Chilika, the largest brackish water lake in Asia. Its is home to many migratory birds in the winters.

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Decomposers and scavengers are those which decomposes the waster organic matter and release energy back in the environment. Hence, they are also called as nature's cleaner. They are present in the apex of the pyramid. Thus, the correct answer is 'Decomposers and scavengers.

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Some species will be extincted.

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One greenhouse gas contributes 14% to total global warming and another contributes 6%. These are respectively identified as CFCs and N2O.

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The concept that 'population tends to increase geometrically while food supply increases arithmetically were put forward by Thomas Malthus. In his theory of natural selection, Charles Darwin was greatly influenced by the English clergyman Thomas Malthus.