Which of the following is an example of biological motive?

Hunger is an example of a biological motive, arising from the body's physiological need for food.

Biological motives are innate drives tied to survival, such as hunger, thirst and sleep.

Achievement (option A) is a social or psychological motive, the learned desire to excel.

Power (option C) is a social motive, the drive to influence and control others.

Affiliation (option D) is a social motive, the need to form and maintain relationships.

Murray's list of psychogenic needs includes achievement, affiliation and power, all learned rather than biological.