Which of the following adaptations enables deciduous trees to produce more food?
a.
thick bark
b.
stretching toward the sun
c.
leaf loss
d.
color change

Thick bark is the adaptation that enables deciduous trees to produce more food.  

Deciduous trees are trees such as oak, maple, and hickory trees which lose their leaves for part of the year. Bark is an important part of a tree that protects the tree. The thick bark of the deciduous trees is composed of many layers and it provides the tree with the necessary nutrients and moisture it needs for its growth.