I think the answer is D but I could be wrong
I have found this question online and realized that "ice" should actually be "eyes", which makes more sense with the context of the sentence.
Answer:
The entire absolute phrase in the sentence is "eyes glittering with concentration".
Explanation:
After reading it, we realize that "eyes glittering with concentration" refers to the sentence as whole. That is what makes it an absolute phrase - instead of modifying just one noun, it modifies a whole sentence. In this case, we can imagine Jack moving his cursor while his eyes glitter, showing how focused he is.
Absolute phrases' structure include a noun or a pronoun followed by a participial phrase. For example: hands trembling with nervousness. Notice that "eyes glittering with concentration" follows that structure.
Participial phrases consist of a participle and modifiers. For example: running out of energy.
The right answer is the last one: The natural imagery is developed throughout to indicate that nature continues long after humans do. The theme of this poem by the renowned American poet Henry Wadsworth Longfellow (1807-1882) is about the unavoidable passage of time for humans and the repetitive essence and continuity of nature, which, unlike the former (who, as the traveler in the poem, one day stop going back to the shore) is endlessly rising, falling, and returning, like the tide. The elements from nature that are mentioned in the poem - the tide, the sea, the waves - are beautifully personified by Longfellow, making the comparison between the temporality of human life and the permanency of nature even more poignant.