Question

The most significant human activity leading to the extinction of wildlife is
A. Hunting for commercially valuable wildlife products
B. Alteration and destruction of natural habitats.
C. Introduction of alien species
D. Pollution of air and water

Answer 1

Hint:
Extinction is the ending of a variety of organisms or a taxon, generally a species. The point of extinction is usually regarded to be the death of the final individual of the species, although the ability to reproduce and rescue may have been lost before this moment. More than 99% of the species that lived on Earth, which means over five billion species, are to have died.

Complete step by step answer:
The most significant reason for extinction today is the loss of habitat. Farming, mining, urbanization, and forestry have disturbed or eliminated more than half of Earth’s ground space. Alien species are introduced by human beings into new habitats. They may bring disorder, disrupt food webs, and prey on native species. Often, they can surpass native species because they lack regional predators. Habitat destruction and alteration of the natural habitat ruin breeding grounds, sources, and shelter of food.
Continued over-harvesting or overexploitation of trees, fish, and other organisms can lead to the demolition of the resource, as it will be incapable to replenish. This endangers their survival and the survival of species that rely on them which is called co-extinction. Global climate change that is largely due to fossil fuels burning results in the raising of ocean and air temperatures which in turn risk many species. Air and water pollution may also have effects on the extinction of wildlife.

Option ‘B’ is correct

Note:
Passenger pigeons, Dodo, Tasmanian tiger, Baiji white dolphin, Pyrenean Ibex, and Steller's sea cow are some examples of extinct species.