Question

what is diffusion and osmosis

Answer 1

diffusion is the movement of any substance from higher concentration area to lower concentration area through a semipermeable membrane.
whereas
osmosis is the movement of  the particular substance "water" from higher concentration to lower concentration through a semipermeable membrane. 
hope it helps    ; )

Answer 2

$<b>$HERE IS THE ANSWER TO YOUR QUESTION!!

MOVEMENT OF MOLECULES FROM A REGION OF HIGH CONCENTRATION TO REGION OF LOW CONCENTRATION IS KNOWN AS DIFFUSION.

MOVEMENT OF WATER MOLECULE FROM A REGION OF HIGH CONCENTRATION TO A REGION OF LOWER CONCENTRATION THROUGH A SEMI-PREAMBLE MEMBRANE IS KNOWN AS OSMOSIS.

HOPE IT HELPED!!