What is the state of a person who dies with complete cerebral and physical palsy after their death, and how will they be held accountable? Do they see and feel those around them? Will they intercede for their family? Do they recognize them? And what is the validity of them being among the birds of Paradise?

I advise you to say "Inna Lillahi wa inna ilayhi raji'un" (Indeed, to Allah we belong and to Him we shall return) and to be patient. If a child dies before puberty, there is no accountability or punishment for him. Rather, Allah places him under the care of Ibrahim in Paradise, and it is established that he intercedes for his parents. One who lacks discernment, such as the insane or the mentally deficient, is not held accountable. The ruling for a mentally retarded newborn is the same as for the insane; there is no religious obligation upon him, nor will he be held accountable on the Day of Judgment. He will enter Paradise if he is from Muslim parents.