Final answer:
The needs for achievement, power, and affiliation are part of David McClelland's theory, which focuses on the social motives that drive human motivation and behavior.
Step-by-step explanation:
The needs for achievement, power, and affiliation are part of David McClelland's theory. McClelland, through his research, described social motives which include these three needs that affect human motivation and behavior. The need for achievement drives individuals to attain performance and success, the need for power encompasses the drive to have influence over others, and the need for affiliation refers to the desire for friendly and close relationships. His theory contrasts with others like Abraham Maslow's hierarchy of needs, which is a more holistic approach to understanding what motivates human behavior, ascending from basic physiological needs to the need for self-actualization.