It changes the wavelength
Frost's use of comparing girls drying their hair to nature is his greatest use of imagery. "Like girls on hands and knees that throw their hair before them over their heads to dry in the Sun." This excerpt has Frost comparing the image of the sun in girls hair to sunlight hitting the leaves of a tree.
“Soon the sun's warmth makes them shed crystal shells Shattering and avalanching on the snow-crust—Such heaps of broken glass to sweep away You'd think the inner dome of heaven had fallen.” Here, the author is defining the magnificence of the birch tree and the power that the winter weather has over it. The image of the bent-over birch trees shows how the constitution of the trees has been bent and changed by the force of winter.
A present participle is formed with the stem of the workd and the suffix -ing and it can have many functions, such as adjective, a part of the verb phrase.
Here all the stentences have a present participle! Here they are:
It is exciting to see the raised head of a dolphin in the water!
exciting - it can be seen as a present participle or adjective
When dolphins are above the water, they are breathing air.
breathing - this is definitely a present participle
Having adapted to pressure changes,
dolphins’ lungs enable them to dive below the ocean’s surface.
here "having" is the participle"
Swimming
dolphins need to break the surface for air every two minutes.
here "smimming" is the participle.
So the answer depends on which word was underlined!
