The answer is the difficulty of determining what is real. Typical modernists had a loss of meaning in the modern world, so there themes included the question of "What is real?" There was a search for meaning in a world without God, and a search for self with a critique of traditional values.
It looks to be that choice "A" has been cut off. If not, then C should be your answer!
I would say the correct answer is <span>B) He feels tied to the land and to the weather in which he grew up. The speaker feels free and unrestrained when he is in the open, at night, with the moon lightening up so he can see the endless horizon clearly. When forced to go back into the house because the summer is over, he feels confined and depressed.</span>