a phase that lasts for a couple months in which the dead person could have the ability to listen and also nod "ok"

Why couldn’t there be a phase, for example, that lasts for a couple months during which a dead person could have the ability to listen and also nod “ok”? Why is it merely life to death? Response to no-response? That’s very extreme. Wouldn’t it make more sense if there was a transitional phase? That would make the mourning, and natural existence, much easier for plants and animals alike. …A, your beloved, is dead. You feel tremendous loss and emptiness, more than you can imagine. Sometimes You REALLY NEED to communicate this to A, to such an extent that you can feel the NEED in every tingling nerve in your body. But, even if you were to verbalize something, there’s no palpable way for A to HEAR or be conscious of what you need to tell him/her. Isn’t that awful? (Is this why men keep creating religions?) Why would nature take such a cruel binary form? On-off, life-death?