Habitat loss is the biggest threat to biodiversity, and it's caused by a variety of factors, including deforestation, urbanization, and agriculture. When animals lose their habitats, they may not be able to find enough food or shelter, and they may be unable to reproduce.
Hunting is another major threat to wildlife, and it's been a problem for centuries. Animals are hunted for their fur, meat, and other body parts, as well as for sport. Overhunting can quickly lead to population decline and extinction.
Climate change is a serious threat to biodiversity, and it's expected to become even more severe in the future. Climate change can affect animals in a variety of ways, including by altering their habitats, disrupting their food supplies, and making them more vulnerable to disease.
Pollution is a major threat to biodiversity, and it can be caused by a variety of sources, including industrial activities, agricultural runoff, and oil spills. Pollution can harm animals in a variety of ways, including by poisoning them, damaging their habitats, and disrupting their food supplies.
Disease can also be a major threat to wildlife, and it can be spread by a variety of sources, including domestic animals, livestock, and wild animals. Disease can quickly spread through a population, and it can cause widespread death and extinction.
These are just some of the reasons why animals become extinct. It's important to be aware of these threats and to take steps to protect animals and their habitats.