Concept:A behavioural adaptation is an action carried out by an organism to survive, including defensive actions against predators.
Explanation:Secreting irritating fluid is an active defensive behaviour that repels or harms a predator.
Hibernation and dormancy are states of reduced metabolic activity, not direct defensive actions.
Shedding of leaves is a structural or physiological response to the environment, not a predator-defence behaviour.
Thus, secreting irritating fluid is the behavioural adaptation that protects prey from predators.
Answer:C. Secreting irritating fluid