Complex sentence: At the end of the experiment, the psychologist saw that the monkeys would choose the cloth surrogate over the wire surrogate and concluded that having basics needs is essential but there is the need of closeness and affection.
Split into simpler sentences: At the end of the experiment, the psychologist saw that the monkeys would choose the cloth surrogate over the wire surrogate. They concluded that having basics needs is essential, but there is the need of closeness and affection.