Classify the following as osmosis or diffusion :
(a) Aquatic animals using oxygen dissolved in water during respiration.
(b) Swelling up of raisins on keeping in water.
(c) Spreading of virus on Sneezing.

Explanation

To classify the given scenarios as osmosis or diffusion, we need to understand the definitions of both processes:

1. **Osmosis**: This is the movement of water molecules from an area of higher water concentration to an area of lower water concentration through a semi-permeable membrane until equilibrium is reached.

2. **Diffusion**: This is the movement of gas or solute molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Now, let's classify each scenario:

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