The correct answer is Gripping tail.
Animal adaptation to life in the tree canopy of tropical rain forest is something that can provide a better grip for holding the tree. The animals such as monkeys needs to move from one tree to another in search of fruits and vegetables available in the rain forest. In this case the gripping tail is the best adaptation to hold the branches of trees. This tail can be used as an aid for climbing trees. A fully prehensile tail is used to hold and manipulate objects.