Probably very similar to how computers can shut off and still obey conservation of energy.

The simple fact is that when we are alive our body (and brain) is burning energy constantly. We eat – we exercise – our body temperature maintains at 98.6 – note that is generally higher than ambient temperature. When we die these things stop. Our body reverts to ambient temperature and the brain transformations stop as the body becomes incapable of providing required energy.

This is a very good question. I have a theory that coincides with Albert Einstein’s theory of alternate dimensions (as well as the conservation of energy). I believe that our “souls”, or energy gets released from our shell of a body. I think that this energy vibrates at higher frequencies (much like atoms) and is able to exist in other dimensions because of this. This is also my explanation of spiritual happenings (which I have unfortunately experienced). Humans are unable to see these energy masses, but they are there nonetheless.

The electrical energy ends.
There's a bit of heat from decomposing.
Nothing more.

OK, consider your body an organic battery, it doesn't really have an enormous amount of energy happening at any one time. Disconnect the battery from anything and the current stops being created. Same with us. Yet the battery if it has anyhtign left, retains the potential to generate more energy.
Let that battery rust, corrode etc, and it is what we call "dead" Smash it with a hammer, grind it up, it is dead.
The energy potential in our bodies comes from sunlight via plants and animals we consume. Stick a pile of grass clippings in a plastic bag and it heats up as they break down. Same with us.

it turns into energy to fertilize the earth. everything is held together by magnetism.

What is the explanation for energy not being able to be created? I'm skeptical. I haven't read or heard anything about this topic though.

It disperses into the environment. Organisms, enzymes and various physical processes break down the tissues and make the components available for other processes and forms, living and otherwise. The "energy" doesn't need to "go" anywhere. I think the body is more like a mechanism, or conductor which utilizes energy while it is an active functioning conduit, and then simply no longer utilizes the energy once it is no longer functional or conducive to living process. Same as a broken electronic device, or an obstructed tributary, the energy simply no longer flows in that direction, because there is no intact channel for it to flow through. The fallacy is that "I" am a stuff... a "thing". "I" is not a thing... "I" is a process.... really, "I" am not a discreet process at all, but merely a branch of a much larger one. So, when the branch that is "I" loses life process, the remaining "twig" becomes brittle and falls to the ground to become compost for the "roots" of the tree.

IS THIS THE THIRD LAW OF THERMODYNAMICS ? i can never remember, i guess decomposition of a body would generate heat ?

Everything turns back to carbon n recycled ? unless I guess u stay in a concrete vault that will not deterate as I see ppl are being burried in now days per state laws may take many decades at least to return to natural true form of star basis--carbons

Will will find out. I think we are not meant to know this answer but to focus on life here and now. Some claim to have seen the aura ascend from a body at death.

One of those little round batteries?

Fuel