Which theory has been accused of simply naming rather than explaining behaviors?

The correct answer to the following question will be "Instinct theory".

Explanation:

As per the motivational concept of instincts, all creatures are created with inborn instincts which allow them for survival. This idea indicates that certain actions are driven by intuition. Intuition is goal-driven and unconscious behavior trends that aren't the product of thinking or experience.

Therefore, the Instinct theory is the right answer.