What condition is most likely in a young adult who displays isolation, increased weight, and disrupted sleep patterns?

The scenario described fits well with Major Depression, particularly due to the combination of isolation, increased weight, and disrupted sleep patterns. Major Depression is characterized by persistent feelings of sadness or emptiness and can lead to significant changes in a person's functioning.

Isolation is often a symptom that reflects withdrawal from social interactions, a common experience for individuals facing depression. Increased weight can occur due to various factors related to depression, such as changes in appetite or sedentary behavior, as some individuals may find comfort in food during emotional distress. Disrupted sleep patterns can manifest as insomnia or hypersomnia, as those affected might struggle with sleep due to their emotional state.

These symptoms align with the diagnostic criteria for Major Depression, which emphasize a pervasive low mood along with physical symptoms that affect day-to-day life. In comparison, while the other options present some overlapping symptoms, none encapsulate the complete picture provided in the described scenario as effectively as Major Depression does.