Entanglement is the property of separate phenomena sharing a common origin, in which one or more undetermined states are shared by the phenomena, so that determination of this state for one of the phenomena instantly results in a corresponding determination of that state for the other phenomenon. For example, if the charge of a pair of entangled particles is undetermined, then if one particle is determined to have a positive charge, the other will have a negative charge.
Entanglement is a natural consequence of quantum systems containing the same information only once.
All behaviour in the universe is the consequence of everything being part of the same quantum system, in which the same information is stored only once. The fact that a quantum subsystem distributes its energy over its degrees of freedom makes it possible for one quantum subsystem to manipulate another quantum subsystem in a manner which can be described as purposeful.
Plato