The word that best describes the speaker's tone in the poem's conclusion is "Uncertain" (Option D)
What is a Tone?
A tone is an attitude that the writer uses as a context with which he communicates the message of the literature.
The tone of an author is seen in the choice of words that they use to communicate.
It is to be noted tha the story of "The time Capsule Found on the Dead Planet" is one about a dead planet. It speaks to the creation, life and death of the planet hence the uncertainty of the tone.
Learn more about Tones at:
brainly.com/question/12176973
