A customer service agent is a professional who provides assistance to customers with inquiries, complaints, and other issues. They are responsible for responding to customer inquiries, resolving customer complaints, and providing general customer service support. Customer service agents typically work in call centers, retail stores, or other customer service-oriented businesses. Linebackers are defensive players in American football who line up behind the line of scrimmage. They are responsible for defending against the run and the pass, as well as blitzing the quarterback. Linebackers must be strong, agile, and have good tackling skills.