Step 1: Understanding the Mediums.
Watercolour and oil colours typically require brushes for application. However, pastel colours are applied directly onto the surface by rubbing or using fingers, without the need for a brush.
Step 2: Verifying the Options.
- Option (1): Watercolour requires a brush for application.
- Option (2): Oil colours also require brushes.
- Option (3): Pastel colours are applied directly by hand or with a blending tool, making this the correct answer.
- Option (4): This is incorrect, as pastel colours are applied directly.
Conclusion:
Therefore, the correct answer is (3) Pastel colour.