Floods cause extensive damage to
(a) Crops
(b) Property and human life
(c) Domestic animals.
(d) all of the above
18. Which of the following gas helps in burning? ,
(a) Nitrogen
(b) Oxygen
(c) Carbon dioxide
(d) Carbon monoxide
19. Layer of air that surrounds the earth is known as
(a) biosphere
(b) atmosphere
(c) environment
(d) ecosystem
20. Major part of the air is constituted by
(a) nitrogen
(b) oxygen
(c) carbon dioxide
(d) inert gases
21. Which one can be used for making manure?
(a) Earthworms
(b) Houseflies
(c) Eagle (d) Crow
22. Garbage from cities is collected at
(a) landfill areas
(b) riversides
(c) inside the ponds and la
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Answer:
crops
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