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Question

Which of the following is not a cause for animals and plants being driven to extinction ?

A
Over exploitation
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B
Alien species invasion
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C
Habitat loss and fragmentation
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D
Facultative mutualism
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Solution

The correct option is C Habitat loss and fragmentation
Facultative mutualism - A type of mutualism in which the interacting species derive benefit from each other but not being fully dependent that each cannot survive without the symbiotic partner. So this type of mutualism will not lead to extinction, whereas obligate mutualism may lead to extinction.

Habitat loss and fragmentation due to over population, urbanization and industrialization is a major cause of extinction.
Many alien species become invasive, competing against or preying on native species, which can lead to their extinction and eventual ecological devastation.
Overexploitation means harvesting species from the wild at rates faster than natural populations can recover. Overfishing and overhunting are both types of overexploitation which can lead to extinction.

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