Complex sentence: Human resource management (HRM, or simply HR) is the management function of an organization responsible for attraction, selection, training, assessment, and rewarding of employees, while also overseeing organizational leadership and culture and ensuring compliance with employment and labor laws.
Split into simpler sentences: Human resource management (HRM, or simply HR) is the management process of an organization's workforce, or human resources. It is responsible for the attraction, selection, training, assessment, and rewarding of employees, while also overseeing organizational leadership and culture and ensuring compliance with employment and labor laws.