Final answer:
The phrase 'gentle rain' typically signifies a light and soothing rainfall, aligning with a positive and tranquil atmosphere in poetry. It is most accurately reflected in option (a) A light and soothing rainfall.
Step-by-step explanation:
In the context of poetry, the phrase 'gentle rain' generally conveys a sense of a light and soothing rainfall. A gentle rain would not depict violence or heaviness; rather, it would indicate a calm and tranquil atmosphere. John Philip Johnson, like Sara Teasdale in 'There Will Come Soft Rains,' often uses natural elements like rain in a symbolic manner to evoke certain emotions or moods.
In literature, descriptions of rain can be used metaphorically, but based on the positive tone associated with the term 'gentle,' the meaning here aligns more with option (a) A light and soothing rainfall. This kind of description can provide a contrast to the heavy, oppressive rain, which might be used to symbolize turmoil or other negative states. The poems and excerpts provided illustrate the diversity of rain imagery in literature, depicting both the gentle and tumultuous aspects of rain.