Final answer:
In 'To Build a Fire,' the man plans to 4)kill the dog and use its body warmth to survive after his fire fails.
Step-by-step explanation:
In Jack London's "To Build a Fire," after the man's attempts to build a fire fail multiple times,
he concocts a desperate plan for survival: 4) he plans to kill the dog and warm his hands in its blood to regain enough dexterity to build another fire.
This idea is born out of his urgent need to warm his numb, freezing limbs to prevent his imminent death.
Nonetheless, this plan ultimately fails as the dog detects something wrong and does not approach the man, leaving him helpless in the brutal cold.