Which of these would correct Sayid's error?

• A. Change the 'move only through matter' to 'move through space and matter.'
• B. Change the heading of the chart to "Mechanical."
• C. Replace 'travel in straight lines' with 'move in curved paths.'
• D. Add 'move due to particles bumping into each other' to the chart.

Answer: (A)

Light can travel through space as well as through matter. Saying it moves only through matter misses a fundamental fact: light propagates in a vacuum, which is why we can see objects in space and why light has its constant speed c in empty space. Changing the statement to say it can move through space and matter correctly captures this property.

The other ideas would distort how light behaves. Labeling the chart as “Mechanical” wouldn’t fit because light is an electromagnetic phenomenon, not a mechanical wave. Saying light always travels in curved paths isn’t accurate in a uniform medium—straight-line travel is the default in homogeneous environments, with curvature only arising from refraction, diffraction, or gravitational effects. And describing motion as due to particles bumping into each other applies to matter, not to light propagation.