Question

The fragrance of incense stick spread out in air to a distance

Answer 1

its due to diffusion..

Answer 2

Answer:

Diffusion

Explanation:

Diffusion is a phenomenon which occurs in gaseous molecules.

It is defined as the intermixing of gaseous molecules due to their movement from lower pressure zone to a higher pressure zone.

in case of incense stick, the fragrance is actually a gas, the molecules of it undergo diffusion and spread everywhere and thus we are able to sense(smell) the fragrance at a distance also.