Question

drag the missing word into place light moves at a faster than sound. speed friction position

Explanation:

To complete the sentence "Light moves at a faster ____ than sound", we analyze the options. "Speed" is the correct term as it relates to how fast an object (or in this case, light and sound) travels. "Friction" is about resistance between surfaces, and "position" refers to location, neither of which fit the context of comparing how fast light and sound move.

Answer:

The missing word is "speed", so the completed sentence is "Light moves at a faster speed than sound."