Question

what are the characteristics of matter demonstrated by diffusion

Answer 1

mixing
reaction.
that's it

Answer 2

Diffusion:

Diffusion is nothing but the movement of molecules from it's higher concentration to loyer concentration.

Or

The sreading out and mixing of aone substance into another substance due to the motion of its particles is called diffusion.

Brownian motion :

The zig-zag movement of small particles suspended in a liquid or a gads is called Brownian motion.Brownian motion tells us that the particles are tiny nature and the particles of a matter are constantly moving.