Hi Mr. Wood, It's Danielle from your period 4 class. Here are the answers to the 3 questions.... 1.The factors that cause this area to be tundra are latitude, temperature, & precipitation. 2. The factors will change with a warmer climate because then more plants will be able to grow. 3. There are no large trees in this area because there is permafrost on the ground. Thanks for your time. Please reply. ~Danielle(: