Which of the following statements correctly compares a grassland ecosystem to a tundra ecosystem? 1.They are both located in the southeastern United States. However, tundra has more trees than grasslands. 2.They are both located in the midwestern United States. However, grasslands receive more rainfall than tundra. 3.They both have a lack of rainfall. However, grasslands are found in the midwestern United States and tundra is found in the southwestern United States. 4. They both have a lack of trees. However, grasslands are found in the midwestern United States and tundra is found in the northernmost region of the United States.