Answer:To sit properly and maintain good posture, follow these guidelines:How to Sit Properly:1. Choose the Right Chair: Select a chair that supports your lower back. A chair with adjustable height and good lumbar support is ideal.2. Adjust the Height: Ensure that your feet are flat on the ground (or on a footrest) and your knees are at a 90-degree angle. Your hips should be slightly higher than your knees.3. Back Position: Sit all the way back in your chair. Your back should be straight and shoulders relaxed but not slumped.4. Position Your Arms: Keep your elbows close to your body at about a 90-degree angle. Your forearms should be parallel to the floor or slightly angled downward.5. Head Position: Your head should be aligned with your spine, not jutting forward. Keep your monitor at eye level to reduce neck strain.6. Take Breaks: Stand, stretch, or walk around every 30 minutes to prevent stiffness and improve circulation.Additional Tips:Use ergonomic accessories, such as a footrest or an adjustable keyboard tray, to enhance comfort.Consider a standing desk or a chair that allows for movement, such as a stability ball or wobble stool.For more detailed information on proper sitting techniques and ergonomics, you can refer to sources like the Mayo Clinic or ergonomic guides from reputable organizations.