There is no answer here, keeping his wits, people hold many superstitious beliefs about the moon. Ice age people recorded the appearance of new fle moons by making scratches in animal bones. It could serve as a supporting sentence but not as a topic sentence.
But thereapos, then again, so drivers run red lights everywhere. It is true that writing topic sentences are usually found at the prompts beginning of a paragraph. This comes from the substance of that particular message you are communicating.