Final answer:
The poetic images suggest that trees are being caressed by gentle breezes, as indicated by the movement of leaves and boughs in response to the wind.
Step-by-step explanation:
In the context of the various poetic images provided, what is most likely being caressed by gentle breezes would be the trees. This is evidenced by multiple extracts, particularly ones that mention leaves, boughs, and branches responding to the wind's movement. For example, one passage describes a scene where the 'play of shine and shade on the trees as the supple boughs wag,' suggesting a sensory interaction between the breeze and tree branches. Another poetic image incorporates the gentle movement of aspen leaves as a breeze crosses the valley. These vivid depictions align with the fourth option that likens the gentle caressing of the breeze to the tender touch upon trees.