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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
Pollution
C
Soil erosion
D
Deforestation
Solution
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When there are no more individuals of a species (plant or animal) alive anywhere in the world, the species is said to be extinct. A decrease in the species diversity progresses to extinction if left uncontrolled. Extinction is also known as the process of dying out. The process is a completely natural part of evolution. But sometimes extinctions happen at a higher and a faster rate than usual. Factors such as large body size, small population, massive habitat loss and position at a higher trophic level favor extinction. As forests are the main habitat for the wild animals, their loss favors the extinction of the same.
So, the correct answer is 'Deforestation'.

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