Respuesta :
The sentence that fits before sentence 2 is sentence (3) Establishing a school culture that focuses on acceptance, respect and tolerance is crucial in putting an end to bullying.
The third sentence fits better than sentence 2 because it continues with the main topic, which is bullying at school, giving more supporting ideas to the topic sentence, which is the first sentence. On the other hand, sentence 2 gives a conclusion to the topic sentence and that is why it should be the last one.
Answer:
Students who are uncomfortable in their school setting are not as likely to earn good grades or participate in extracurricular activities.