Something that is delicate is small and beautifully shaped having a soft and fragile beauty.
Images depicting the texture of fabrics, be it silky or velvety spring to mind, or maybe images of lace.
We can imagine seeing images of petals of flowers, the wings of an insect, or a feather. Or images showing the softness of skin or the softness of fur.
We could also imagine creative interpretations showing soft colours or soft focus, a delicate breeze. The flavours of wine are sometimes referred to as delicate and soft.
Let your creativity flow and just remember to include in your note how you think your image fits the theme.