Indica los elementos que intervienen en estos actos comunicativos (emisor, recpeto…) La letra L (sobre fondo verde) en la luna trasera de un coche
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What are the choices

Generally spontaneous human combustion is something that still bewilders some, human combustion happens very rarely and doesn't affect the surrounding areas, so unless you want to set your self on fire, human combustion will remain spontaneous and very rare.