Hello! To answer your question, the ideal type of death that should occur before biological death is a medical death.
Medical death refers to the point at which there is a complete and irreversible cessation of brain function and the body can no longer sustain life. This is typically determined through medical tests and assessments, such as an electroencephalogram (EEG) and a clinical examination.
While political, religious, and social factors may influence the way that death is perceived and dealt with in different cultures and societies, medical death is a necessary prerequisite for biological death.