Final answer:
The section of the job description that briefly identifies major functions or activities is the Job summary, which is fundamental for understanding the role's main responsibilities.
Step-by-step explanation:
The section of the job description where the major functions or activities are briefly identified is a) Job summary. This aspect of the job description provides an overview of what the role entails, including the main responsibilities and duties the employee will perform. When industrial psychologists are involved in the creation of job descriptions, they use job analysis techniques to ensure the position is accurately described, which aids in the employee selection process. The task-oriented approach of job analysis focuses on listing the tasks performed, while the worker-oriented approach looks at the characteristics needed of the worker, known as job specification. It's important for job seekers to understand these elements when reviewing job descriptions, as they provide valuable insights into what the position will entail.