Throughout the site, the word Soul has been used to mean –
“The Instinct of a creature that separates him from other”
Actually, the word “Soul” is referred to mean Atma, which actually is something that is not different from creature to creature. It is only the instinct, which is basically a part of our intellect, that is different from one creature to other.
Basically, as this instinct plunges itself in the intellect, it catches the hold of DNA structure, that remains implanted in the intellect. This DNA is procured from Progeny, which is transmitted to a new born from his/her parents and this DNA configuration includes everything the parents face, i.e. the bodily nature, emotional nature and spiritual nature of the Parents.
It is the instinct that can transform five elements to life. Thus, it when that the instincts gets inside a body and intellect, that the body finds life and it is when that this instinct leaves the body, the body becomes lifeless.