Plants and animals need to be tough to survive in the arctic tundra. However, temperatures on Earth are changing. Because of this, more animal species are moving into the tundra. For example, the red fox has recently been found living there. As Earth's climate warms, the frozen ground in the tundra is beginning to melt. More types of plants and animals are able to live there. These changes concern scientists. They worry that the plants and animals already living there will not be able to survive changes in the tundra. What is the meaning of tundra? 1. temperature 2. cold, harsh region 3. type of plant or animal 4. place where nothing can live