Answer:
“And all the time, in his consciousness, was the knowledge that each instant his feet were freezing. This thought tended to put him in a panic, but he fought against it and kept calm.”
Step-by-step explanation:
Internal conflict is when a character is in a dilemma with his own feelings or emotions. In other words, we can say an internal conflict is when there is a struggle within the character, without any external force involved.
In Jack London's "To Build A Fire", there are several instances of internal as well as external conflicts in the man character. One example of an internal conflict among the options given is in the first option. Here, the conflict is within the character, where the dilemma is between his consciousness, his knowledge that his feet were freezing, and the perseverance to keep moving. His mind tells him he's freezing while he also knows that he has to keep moving.
Thus, the correct answer is the first option.