This leaf has been detached from a tree. This is caused by abscisic acid. Abscisic acid is what causes leaves to detach, and it also stops seeds from germinating and budding. This tree responded to the cold by producing abscisic acid, which then detached the leaf.

This is a tree frog. Tree frogs are a great example of an adaptation of an animal. Special features that certain animals have that help them in their environment are considered adaptations. Tree frogs have great camouflage, which helps them blend in with trees and other plants, which helps them hide from predators.