Correct option is D
The correct option to fill in the blank is “gathered.”
Explanation:
The word "gathered" is appropriate because it refers to dust accumulating in a place over time.
Example of correct answer in a sentence: Dust has gathered in the crevices of the house.
Meanings of other options:
Flown: Moved through the air.
Assembled: Collected or brought together.
Lived: Existed in a specific place or environment.