The accelerated rate of species extinctions that the world is facing now is largely due to human act...........

Geography and Environment (HCS) Biodiversity

The accelerated rate of species extinctions that the world is facing now is largely due to human activities. There are four major causes also known as 'The Evil Quartet' Consider the following statements about 'The Evil Quartet':

1. Habitat loss and fragmentation.

2. Over exploitation.

3. Evolution.

4. Co-extinctions.

5. Migration.

6. Alien species invasion.

Select the correct answer using the code given below.

2, 3, 4 and 5 only

1,2,4 and 6 only

1, 2, 5 and 6 only

1, 2, 3 and 6

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Explanation:

Evil Quartet
The ‘evil quartet’, or ‘four horsemen of the ecological apocalypse’, was probably the first treatment of extinction dynamics as a biological discipline in its own right. Jarod Diamond (1984) took a sweeping historical and contemporary view of extinction, then simplified the problem to four principal mechanisms:
1.    overhunting (or overexploitation),
2.    introduced species,
3.    habitat destruction and
4.    chains of linked extinctions (trophic cascades, or co-extinctions).
Hence, answer is B.