Poem Tone Analysis

Read the following excerpt from a contemporary poem:

The sun fades into the horizon, bleeding colors into the gray.

Whispers of the past linger, tangled in the shifting clouds.

Time drips like wax, each droplet heavy with memory,

Concealing laughter beneath a sheet of silence.

Considering the language and imagery used in this passage, which of the following options best describes the overall tone of the poem?