This is a behavioural interview question designed to give the interviewer insights about your personality. There are no right or wrong answers. The key, though, is to be prepared to back up your answer with a good explanation as to the why. For example, you could say, "I read the business section of the newspaper to stay on top of new trends and forces driving the economy."; or, "I read the sports section because it helps me keep a pulse on the heartbeat of our community." Whatever you say, just be confident, speak coherently, have solid reasoning, and above all, be your authentic self.

I don't know when I was read the same questions about interviews I saw it .. I thought its type of idioms

That's a strange question. The answer to a question depends on what the question is. 'this question' or 'these questions' 'what did you read the train?' doesn't make sense. Did you mean 'what did you read on the train?'