Final answer:
HR professionals must have knowledge of workplace culture, employee rights and responsibilities, workplace safety, performance evaluations, and work-life balance.
Step-by-step explanation:
The five critical pieces of knowledge required by HR professionals include:
- Workplace culture: understanding how to dress, communicate, manage time, and resolve conflicts professionally
- Employee rights and responsibilities: knowing your rights as an employee and your responsibilities in the workplace
- Workplace safety: understanding the importance of workplace safety and following procedures to ensure a safe working environment
- Performance evaluations: knowing the purpose and process of performance evaluations and how to prepare for them
- Work-life balance and stress reduction: understanding how to promote work-life balance and reduce workplace stress