I know in Islam, everything has a soul, as everything glorifies God. Trees, sand, atoms, animals, all glorifies God and has a soul.
Hey, I like it! It sounds about right.
I do not believe that a soul is what animates the body. My experience with other souls far outweighs my understanding of how things are so.

But I tend to believe that spirit matter and physical matter are somehow intertwined. Even that perhaps with the Big Bang, both were created simultaneously, and coexist on slightly different dimensions or planes of existence (or something like that!)
We know that after the Big Bang physical matter condensed into shapes and fusion produced the various elements. Over great amounts of time we now have objects made from various combinations of the elements. And eventually Life as well. Meanwhile, spirit matter also changed and condensed, and individual consciousness sprang into being and "souls" were born.
I think souls have an awareness and are conscious beings. Most are still joined to the physical realm, and are intimately connected to something tangible. Those connected to living items, have the advantage that they can live vicariously through their plant or animal. The further evolved the nervous system, the more "in touch" with the physical realm they can be.
With theistic evolution, it is possible to conceive that the development of life happened in order to accommodate the needs of the many souls that inhabit the Earth. That consciousness and self awareness in animal intelligence, might just mimic the same traits developed in souls. This becomes confusing, because with my soul consciousness I can connect with a tree who has no brain nor ability to speak. But then with my physical mind I can reason out the mysteries of this problem, and formulate words to express it to the rest of you. The two modes of consciousness are very similar, which is probably why the psychic abilities are classified by their similarity to physical senses. (Clairaudience is the ability to "hear", clairvoyance the ability to "see", etc.)
Most souls do not do well when disconnected from a physical body. This accounts for ghosts and demonic possession. There also has to be some control over which soul gets placed into which body, and the regulating of how many are allowed to do so, which is where I believe God comes in. I feel we are set here for a purpose, and that there are indeed good reason to live in bodies that have highly developed intelligence. The Christian life explains to me why we are what we are, and what God is up to on our behalf.
