In analyzing the case study of Callum and Hannah, several psychological, sociological, and economic theories can be applied to understand their situation and challenges. Here are some relevant theories:
### 1. **Grief and Bereavement Theories**
- **Kubler-Ross Model (Stages of Grief)**: This model outlines five stages of grief: denial, anger, bargaining, depression, and acceptance. Callum is likely experiencing one or more of these stages