The best summary that captures how the passages support themes about nature and human perception is:
Nature and humanity can be reflections of one another.
In "Kew Gardens," Woolf illustrates the interconnectedness of human experiences and the vibrant aspects of nature, highlighting how both merge and influence perception. In contrast, Mansfield's "A Cup of Tea" presents a more introspective view where nature reflects the protagonist's emotional state, emphasizing a deeper awareness of the surrounding world, particularly in contrast to her internal feelings. Both passages illustrate the relationship between human emotion and the natural environment, emphasizing how they can mirror and shape each other.