Organisms that live in deciduous forests have developed unique adaptations that aid in their survival. which of the following is not an adaptation that characterizes deciduous trees

None of the above, according to the given choices of the original question. 

Adaptation is characterized by a change in an organism's structure or physiology due to selection forces caused by the harsh conditions of the environment that pushes a specie to either adapt to the change or die and be extinct in its existence.