The question asks to identify the correct terms for applying poster colour again on a layer that has already dried.

Applying Poster Colour Techniques Explained

When a new layer of colour is applied over a previously dried layer of paint, it involves placing one element on top of another. Let's analyze the options:

• Superimposing (B): This term accurately describes the act of placing one thing over another, so one covers or partially covers the other. This fits the scenario of applying a new colour layer over a dry one.
• Laying on top of another (D): This phrase directly describes the physical action of placing a new layer of colour above a pre-existing, dry layer.
• Coating (A): While applying paint can be considered a coating, this term often implies covering the entire surface, sometimes evenly or thinly. It doesn't specifically capture the idea of layering opaque colours distinctly.
• Wash (C): A wash typically involves diluted paint, often applied to create a thin, sometimes transparent or semi-transparent, layer of colour. Applying poster colour *again* on a *dried* layer usually implies building opacity or distinct colour areas, which differs from the technique of a wash.

Therefore, the most fitting descriptions for applying poster colour again on a dried layer are superimposing and laying on top of another.

Conclusion on Correct Terms

Based on the analysis, the terms that best describe the action are 'Superimposing' (B) and 'Laying on top of another' (D). These directly relate to placing one distinct layer of colour over another.