Answer:
Robinson Crusoe feels that living in the confinement of a prison is almost similar to live in an isolated no-mans island.
Explanation:
No.1. Living completely alone in an island far away from main land is also painful.
No. 2. Whether, Robinson Crusoe goes for hunting or cook his meal. There is no-one to accompany him. He is all alone.
No. 3. His loneliness makes him feel angry and he weeps like a child. Since, we all know that man is a social animal.
No. 4. there is hardly anyone to talk to. It is only the roaring of the oceans, the wind and occasionally the call of a bird. Crusoe could hardly find anyone to talk freely about his mind and share his feelings.