The correct option is A i-b-1, ii-a-3, iii-d-2, iv-c-4
∙ Image (i) shows conditioning. Conditioning is a learned behaviour. In Ivan Pavlov's experiment, dog salivates on hearing the bell ring even in the absence of food. It is conditioned to do so.
∙ Image (ii) shows imitation. Imitation is a type of animal behaviour where one animal copies the behaviour of other animal. E.g., Chimpanzees copying other animal's behaviour.
∙ Image (iii) shows instincts. Instinctual behaviours need not be learned. They are present by birth. Making nest by birds, web spinning by spider, etc., are the examples of instinctual behaviour by animals.
∙ Image (iv) shows imprinting. Ducklings recognising their mother is an example of imprinting. They follow their mother for food and protection.