Which of the following are responsible for extinction of a species?
A. loss of habitat
B. excessive use of chemical fertilisers and pesticides
C. providing habitats for animals in zoos
D. clearing of land to plant crops and build roads

(a) all the above
(b) A, B and D
(c) both A and D
(d) only C

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Solution

(b) A, B and D

Deforestation and clearing of lands lead to loss of habitat of animals, which can eventually cause extinction of a species. Chemical fertilizers and pesticides lead to death of animals, as they accumulate these chemicals through food chain and also, it disturbs ecological balance.

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