The passage does not provide a specific statement giving a reason for this belief.
To provide a step-by-step analysis, I would need the passage or specific text that mentions the author's beliefs about sports and children. Could you provide the passage or a specific excerpt related to this topic?
To find the statement from the passage that gives a reason for the belief that playing sports is good for children, you would need to refer to the text or passage provided. Please provide the passage so that I can help you identify the relevant statement.
