Question

The main reason for extinction of species is
(a) Hunting
(b) Destruction of Habitat
(c) Pollution
(d) None of the above

Answer 1

Hint Extinction of specific animal or plant species happens when there are no more individuals of that species alive anywhere around the world or we can say that species has died out.It also occurs because of global change,natural disaster,over exploitation of species etc.

Complete step-by-step answer
Let’s discuss the options and find out the correct answer
- Hunting: Hunting is an act of seeking,pursuing and capturing wild animals.It is commonly done by humans for meat,recreation.Hunting can be a means of pest control.This option is incorrect.
- Destruction of Habitat: Habitat destruction is the process by which the organisms that previously used the site are displaced or destroyed, are therefore decreasing biodiversity. The highest contributor to the extinction of many species is Habitat destruction. This destruction is mainly happening in both terrestrial and aquatic biomes, which has an approximately 80% of all extinctions being attributed to human caused habitat destruction. Terrestrially the destruction includes forests, deserts and grasslands, but the latter may account for the greatest losses due to the agricultural and urban conversion. This option is correct.
- Pollution: Pollution is defined as contamination of air,water that are harmful to living organisms.Humans are affected by pollution and the disease which is caused are asthma or cancer and animals are victims of its effects too.Many of the species have experienced these pollution that can cause deaths or threat to their habitat.Some of the species have pushed to extinction also.This option is incorrect.
Hence, the correct answer is, ‘(b) Destruction of Habitat’.

Note There are 10 extinct species - 3West African Black Rhinoceros, Baiji White Dolphin, Pyrenean Ibex, Passenger Pigeons, Tasmanian Tiger, Steller's Sea Cow, Great Auk, Dodo, Woolly Mammoth, Sabre-toothed Tigers.