Answer:
A. They could feel the cold as it crept in through the cracks, reaching out for them with its icy, death-dealing fingers; and they would crouch and cower, and try to hide from it, all in vain. It would come, and it would come; a grisly thing, a specter born in the black caverns of terror.
Step-by-step explanation:
Tone is the attitude, sound or vibration of how the writer or narrator feels. It presents the mood or circumstances of the setting or a character.
In the given two passages, passage A has a more threatening tone. This can be known by the use of words such as "icy, death-dealing fingers", "cower" "grisly" or "black caverns of terror". These groups of words present a dangerous, evil, frightening image that can help the reader understand the tone of the narration.
Thus, the correct answer is option A.