Dialectics in China's traditional culture is timeless, immortal and brilliant. The following options contain "contradiction is the driving force and source of things' change and development"

A

Analysis of test questions: In item A, "harmony with real creatures means that only uneven and different things can learn from each other and produce new things, while when exactly the same things get together, they can only stay in the original state forever and cannot continue to develop, which shows that contradiction is the driving force and source of things' change and development, which conforms to the meaning of the question and can be selected. In item B, "If the world is different, things will be different, and if things are different, they will be prepared for change", which emphasizes that things are moving and developing, which is irrelevant, so they cannot be selected; In item C, "The golden dollar is full of red money, and no one is perfect", which emphasizes that it is necessary to look at the problem from a comprehensive point of view, which is irrelevant, so it cannot be selected; In item D, "Knowledge is the beginning of action, and action is the achievement of knowledge", and the relationship between practice and cognition of wrong expression belongs to subjective idealism, which is irrelevant, so it cannot be selected. Therefore, the answer is item A.