In this excerpt, what is the effect of the phrases "so fresh, so bright, so cheerily green, and all so low and calm and silent …"?
a
They create repetition to lull the reader into a relaxed atmosphere.
b
They emphasize the author's intense fascination with the thunderstorm.
c
They produce a vivid image of the Echinopanax horridum for the reader.
d
They contribute to the upbeat rhythm and sense of awe in the passage.
e
They add to the scientific details included earlier in the passage.