Final answer:
A bargaining unit is a group of employees who share common employment interests and conditions and negotiate with their employer for better terms of employment.
Step-by-step explanation:
A bargaining unit is a group of one or more employees who have common employment interests and conditions and may reasonably be grouped together for purposes of collective bargaining. This means that individuals who share similar employment interests and conditions, such as wages and working hours, can join together in a bargaining unit to negotiate with their employer for better terms of employment. A union is formed when a group of employees elects a representative to negotiate on their behalf with the employer.