Final answer:
Psychoanalytic theory includes the idea that mothers can be blamed for their children's loneliness due to lack of nurturing and attention leading to basic anxiety and coping mechanisms that include withdrawal or isolation.
Step-by-step explanation:
The model that included theorists blaming the mother for a child's loneliness is c) Psychoanalytic theory. Psychoanalytic theorists like Karen Horney suggested that childhood experiences of loneliness and/or isolation can lead to basic anxiety, and children cope with this anxiety in various ways. One such coping style, moving away from people, involves children handling their anxiety by withdrawing from the world, which can imply a lack of adequate nurturing and attention from the primary caregiver, often the mother. While attachment theory, developed by John Bowlby, also emphasizes the mother's role in a child's social and emotional development, it does not specifically blame the mother for a child's loneliness but instead focuses on the importance of a secure attachment for healthy development.