What animals live in a cold place like the Arctic?

Polar bears, Arctic wolves, Arctic foxes, musk oxen, reindeer... In the Arctic, there is an ancient creature left over from the Ice Age, and it is also the largest terrestrial herbivore in the Arctic - the musk ox (Also known as Arctic Musk Ox). It has survived on the earth for 600,000 years. You must know that this is by no means a simple matter, because the mammoths and other behemoths at the same time have long been extinct due to changes in the earth's environment and over-hunting by early humans. Musk oxen live in the Arctic tundra and feed on mosses and lichens. Although it is a grass-eating animal, its character is not weak, but rather stubborn and persevering. Even when faced with powerful enemies such as polar bears and arctic wolves, it will never back down and would rather fight to the end. After understanding the musk ox, we need to talk about reindeer, because reindeer are also herbivores. About 2 million years ago, reindeer were one of the main foods for humans. At that time, humans mainly relied on hunting reindeer to absorb nutrients. Later, in cold areas, people domesticated reindeer as pack vehicles. In the Arctic, reindeer can weigh more than 150 kilograms, and males are slightly smaller, weighing about 90 kilograms. Both male and female reindeer have a pair of branch-like antlers with a span of up to 1.8 meters. The horns are replaced every year. As soon as the old ones fall off, new ones begin to grow. Reindeer live in boreal and sub-boreal forests and tundra zones. It mainly feeds on lower plants such as moss and lichens. As the seasons change, it will also eat branches and buds of trees, mushrooms, etc. The Arctic wolf, also known as the white wolf, is a subspecies of the gray wolf. It is a medium-sized wolf with a length of 89 to 189 centimeters. In order to adapt to the cold climate of the Arctic, Arctic wolves have a thick layer of fur, and not all adult wolves have white fur. You can also see wolves with red, gray and black fur. The variety of coat colors allows them to use the grays, greens and browns of the woods as cover to approach prey. Their teeth are very sharp, which helps them hunt prey. In the Arctic, from the perspective of ecological balance, Arctic wolves are an indispensable part. They restrict the number of large herbivores such as reindeer and musk oxen, and play an indirect role in protecting the grassland. Arctic foxes have lived in the Arctic coastal areas and tundra areas on some islands for generations. Their bodies are 46 to 68 centimeters long, small and fat. The fur on the Arctic fox is long, soft, and thick, which can withstand the cold. What's interesting is that their fur changes color with the seasons: in winter, the fur is pure snow white, with only the tip of the hairless nose and tail black. However, from spring to summer, the color of their fur gradually changes to blue-gray, and in summer, the body hair changes to gray. It is black. If you observe carefully, you will find that the Arctic fox has a tail with extremely fluffy tail hairs. Just by looking at it, you can imagine how good it feels. Source: Primary School Science