Final answer:
According to Maslow's hierarchy of needs, self-actualization needs are in the highest category.
Step-by-step explanation:
According to Maslow's hierarchy of needs, the highest "need" category is Self-actualization needs. Maslow proposed a pyramid-shaped hierarchy where physiological needs, safety needs, social needs, and esteem needs are lower-level needs that must be met before one can strive for self-actualization. Self-actualization represents achieving one's full potential and is only pursued once all the lower needs have been fulfilled.