Answer: A)sensory information related to sound
Explanation:
This passage is showing how the sound made the character more aware of the situation.
He was not aware of what he was seeing until he heard a muffled grating sound. Even though the sound was muffled, after that the paid attention on the object, the black mark, that was moving, and then the sound lost its significance.
- If there would not be the sound, the character would not pay attention to the object and that is why it is showing how sound and sensory information are related.
