Respuesta :
Smells travel through the air by diffusion. Air particles, and the odor particles within the air, move freely in all directions plus odors are constantly moving.
Answer:
The aroma of the popcorn spreads throughout the room gradually due to the presence of air.
Explanation:
The popcorn bag releases an aroma when opened. This aroma then travels through the air due to which the aroma spreads throughout the room.
Note:
If the room was closed, the aroma will remain inside the room. If the room was open, the aroma will also spread beyond the room due to the presence of air.