Definition: You are given a question on college biology. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: The crouching of very young birds in response to a predator’s shape overhead is an example of
(A)a conditioned response (B)a fixed action pattern (C)an imprinted behavior (D)learned behavior

B