Passage Summary: Researchers noticed that kids who could write their ABCs effortlessly also became the best at writing stories, suggesting that not having to focus on the handwriting itself left more brainpower for the creative stuff.

Conclusion: The ability to write letters automatically allows a person to use their mental energy for other tasks like composition.

Reasoning: In a study of first-graders, the students who showed the most improvement in their story-writing skills were the ones who had become the most proficient at writing letters without thinking about it.

Analysis: The argument assumes a causal relationship: that the 'automaticity' of handwriting is what *caused* the improvement in composition. To strengthen this, we want to see evidence that these two tasks actually compete for the same limited pool of mental resources. If we find that forcing kids to focus on their handwriting actually hinders their ability to think of what to write, the argument becomes much more persuasive. Look for an answer that reinforces this trade-off of mental energy.