Endangered species are plants and animals that are at risk of extinction due to causes like hunting, habitat destruction, and pollution. Examples of endangered species include tigers, whales, koalas, mistletoe, moss, and araucaria. These species are threatened due to human activities and environmental damage. To help protect endangered species, people can reduce pollution, use alternatives to driving when possible, and properly recycle materials like paper, plastic, glass, and organic matter. Finding solutions is important to create a healthier planet for all species.