**Explanation:**

**Endangered Species:**

Endangered species are those species of plants and animals that are at risk of becoming extinct in the near future. These species have a very small population size or their habitats are rapidly disappearing. They are also vulnerable to various natural and human-induced threats such as habitat loss, pollution, climate change, poaching, and disease. Endangered species are given special protection and conservation measures to prevent their extinction.

**Reasons for Endangerment:**

1. **Habitat Loss:** One of the main reasons for endangerment is the loss of habitat due to deforestation, urbanization, agriculture, and infrastructure development. As their habitats shrink, endangered species have less space to live, find food, and reproduce.

2. **Poaching and Illegal Wildlife Trade:** Many endangered species are targeted by poachers for their valuable body parts or as exotic pets. The illegal wildlife trade is a major threat to their survival, as it leads to the further decline of their populations.

3. **Climate Change:** The changing climate and global warming have a significant impact on the survival of many species. Rising temperatures, changing rainfall patterns, and extreme weather events can disrupt their habitats and affect their ability to find food and reproduce.

4. **Pollution:** Pollution, including air, water, and soil pollution, can harm and kill endangered species. Chemicals and pollutants released into the environment can accumulate in their bodies and disrupt their physiological processes.

5. **Invasive Species:** The introduction of non-native species into ecosystems can have devastating effects on native species. Invasive species can outcompete native species for resources, prey on them, or introduce diseases, leading to population declines and endangerment.

**Conservation Efforts:**

To protect endangered species and prevent their extinction, various conservation efforts are undertaken, including:

1. **Protected Areas:** Creating protected areas such as national parks, wildlife sanctuaries, and biosphere reserves helps to preserve the habitats of endangered species. These areas provide a safe space for them to live and breed without human interference.

2. **Legislation and Regulations:** Governments enact laws and regulations to protect endangered species from hunting, poaching, and habitat destruction. These laws provide legal protection and penalties for those who harm or trade in endangered species.

3. **Conservation Breeding Programs:** Breeding programs are established to breed endangered species in captivity and reintroduce them into the wild. These programs aim to increase their population size and genetic diversity.

4. **Education and Awareness:** Raising awareness among the public about the importance of biodiversity and the threats faced by endangered species is crucial. Education campaigns and outreach programs help to promote conservation and sustainable practices.

By implementing these conservation measures and addressing the threats faced by endangered species, we can work towards their recovery and prevent their extinction.

It is because it didn't extinct yet but is in the risk of extinction.