Answer:
Schooling is hard for some students.
Explanation:
Option 1: The end of the school year is irrelevant to the sentence. Incorrect.
Option 2: Schooling isn't hard for every student, some is a good word to describe 'not all'. Changing school to Schooling is a good noun phrase to use, during 'schooling' times it's hard for some students. Correct.
Option 3: Teachers are irrelevant to the sentence. Incorrect.
Option 4: The end of the school year is irrelevant to the sentence. Incorrect.
I think it’s the first one if you if it’s not right I’m so sorry I’m not really sure
The author builds up suspense by most by waiting to reveal the minotaur