Final answer:
Sabrina is likely experiencing depression since she has persistent sadness affecting key aspects of her daily life such as eating and sleeping, which is a classic sign of clinical depression.
Step-by-step explanation:
The symptoms of depression can manifest in various forms, ranging from short-term to long-term struggles. Sabrina's situation, where she experiences persistent sadness that impacts significant parts of her daily life such as eating and sleeping, is one of the clearest clinical indicators of depression.
This persistent sadness that interferes with daily functions is a common symptom of depression. It is not a normal reaction to loss and indicates that her mental health may be compromised. The other situations mentioned reflect normal human emotions linked to specific events, such as grief or jealousy, and are often not themselves indicative of clinical depression.