What ergonomic adjustment helps establish proper posture while using a computer?

Supporting the lower back is essential for maintaining proper posture while using a computer because it promotes a natural alignment of the spine. When seated for long periods, a chair that provides adequate lumbar support helps to prevent slouching and encourages the user to sit upright. This support alleviates pressure on the lower back, reducing the risk of discomfort and potential injury over time. Proper lumbar support creates a healthier sitting posture, which can enhance focus and productivity while using a computer.

The other options, while they may contribute to overall comfort, do not specifically target spinal alignment in the same way. Resting feet on a chair may affect how weight is distributed across the back and legs but does not directly address lumbar support. Tilting the monitor at an angle can help reduce neck strain but doesn’t impact the lower back directly. Using a standing desk promotes a different posture altogether but may not be feasible or comfortable for everyone, especially within specific tasks that require sustained focus on a screen.