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Question

Decrease in species diversity in tropical countries is mainly due to
  1. Urbanisation
  2. Pollution
  3. Deforestation
  4. Soil erosion

A
Urbanisation
B
Deforestation
C
Pollution
D
Soil erosion
Solution
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One of the important reasons behind the destruction of species diversity is habitat loss and fragmentation by cutting trees. This is the most important cause of driving animals and plants to extinction. The most dramatic examples of habitat loss come from tropical rainforests. Once covering more than 14 percent of the Earth's land surface, these rainforests now cover no more than 6 percent. They are being destroyed fast
So, the correct answer is 'Deforestation'

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