Why is keeping the wrist straight good during long computer work?

Correct answer: To reduce wrist strain

Keeping the wrist straight during long computer work helps maintain a more neutral position for the hand and forearm. This can reduce unnecessary bending, pressure and strain on muscles, tendons and joints. Good wrist position is one part of ergonomic computer use, along with a suitable keyboard height, relaxed shoulders and regular breaks. Therefore, option A is correct. Wrist position cannot increase sound, brighten the screen or remove a chair.

The question asks about a health benefit, so the relevant choice must relate to physical comfort and injury prevention. If the wrist remains sharply bent for a long time, tissues may experience extra stress and discomfort. A straight, relaxed position does not guarantee that all problems will be prevented, because posture, workload and breaks also matter, but it generally supports safer computer use. Thus, reducing wrist strain is the most accurate reason and makes option A the correct answer.