Answer: All the above(Option E)
Step-by-step explanation:
The adaption that is required by the plants and animals of the tundra region must include the features that allows them to survive in extreme cold conditions.
The plants in the tundra region does allows the falling of dead leaves, they retain the dead leaves in the plant only for surviving in such conditions.
The animals their have thick fur and dense hair so that it can act as insulator to keep their body warm. They have fur in their feet to walk in such cold conditions.