① ④ Correct. The implications and hints of cartoons give us enlightenment: to realize the unity of subjective and objective concrete history and oppose subjectivism;

② It doesn't conform to the meaning of the topic, and the topic theme doesn't reflect the need to establish innovative consciousness;

(3) It doesn't conform to the meaning of the question, and the inspiration given by the cartoon implication and hint is to proceed from reality and give full play to people's subjective initiative correctly;

So the answer is a.