* Climate change: The climate during the last glacial period was cold and dry, which was ideal for mammoths. However, the climate began to warm up about 10,000 years ago, and this warming trend caused the mammoth's habitat to change. The mammoths were not able to adapt to these changes, and their populations began to decline.
* Overhunting by humans: Humans began hunting mammoths for food and fur around 15,000 years ago. Over time, the number of mammoths killed by humans increased, and this contributed to the decline in their population.
* Competition with other animals: Mammoths also faced competition from other animals, such as saber-toothed cats and giant short-faced bears. These animals preyed on mammoths, and they also competed with mammoths for food and territory.
It is likely that a combination of these factors led to the extinction of mammoths.