Walked. We is the subject and to the Park is where the subject went. Walked is what they did.
In Jack London's "To build a fire" the main theme is Man vs. Nature, the main character is crossing the Alaskan frozen landscape, following the path of the Yukon river. He dismisses the advice of the old-timer and he also doesn't pay attention to his companion, the dog who can feel the threat of the harsh weather. The right answer is the second option.
Answer:
Sentence #1
Explanation:
Why things wouldn't be capitalized correctly:
-seasons aren't capitalized (eliminates sentence 2)
-months are capitalized (eliminates sentence 3)
-unimportant objects are not capitalized (eliminates sentence 4)