Final answer:
In Harry Harlow's study, the baby monkeys preferred the cloth mother because they valued comfort and security over nourishment.
Step-by-step explanation:
In Harry Harlow's study, the baby monkeys preferred the cloth mother. Harlow conducted a series of experiments where he presented the monkeys with two surrogate mothers: one made out of wire mesh that could provide milk, and the other made of cloth that couldn't provide nourishment. Research showed that the monkeys spent most of their time clinging to the cloth mother, demonstrating a preference for comfort and security over nourishment.