Which action should the teacher take when noticing the boy's severe emotional distress during class?

The action of immediately referring the boy to the counselor is appropriate because when a student exhibits severe emotional distress, it is crucial to provide them with immediate support from a professional trained to address mental health issues. Counselors are equipped to evaluate the emotional state of students, offer counseling services, and provide the necessary interventions or resources.

Emotional distress can significantly impact a student's ability to perform academically and socially within the classroom, making it essential for the teacher to act promptly to ensure the student receives specialized help. Such a referral prioritizes the student's well-being and allows for a more in-depth assessment and potential intervention that a teacher may not be qualified to provide.

In comparison, other options may not effectively address the immediate needs of the student experiencing emotional distress. Seeking help from another teacher or discussing the situation with the principal could result in delays that may exacerbate the student’s condition. Instructing the student to try harder to focus may dismiss the underlying emotional issues and put additional pressure on the student instead of addressing their needs compassionately.