Test analysis: Water is the source of all things, which is ancient naive materialism's point of view, and the theory of five elements also belongs to ancient naive materialism's point of view. A is not in line with the meaning of the question. This view is dialectical materialism. B doesn't fit the question. This view is dialectical materialism. C In line with the meaning of the question, ancient naive materialism believes that the world is material. D does not meet the meaning of the question. This view is dialectical materialism.

Comments: This kind of examination requires students to master the relevant knowledge of ancient naive materialism. In ancient times, simple materialism denied that the world was created by God, thought that the world was material, and adhered to the fundamental direction of materialism, which was essentially correct. However, these views are only a valuable guess and have no scientific basis; It reduces matter to concrete material forms, such as water, fire, gas and earth, thus simplifying complex problems. The difficulty of this question is low, and students are required to analyze and judge the materials on the basis of mastering book knowledge.