Osmosis is a special kind of diffusion in which the solvent molecules migrate from solvent to the solution side through a semipermeable membrane. Classify the following into osmosis/ diffusion:
a. Swelling up of a raisin on keeping in water. b. Spreading of virus on sneezing. c. Earthworm dying on coming in contact with common salt. d. Shrinking of grapes kept in thick sugar syrup. e. Preserving pickles in salt. f. Spreading of smell of cake being baked throughout the house. g. Aquatic animals using oxygen dissolved in water during respiration.