Final answer:
The invocation stage of a ritual opens up communication to the spirit realm and allows an exorcism to occur.
Step-by-step explanation:
The invocation stage of a ritual, which involves calling upon the spirit world, opens up communication to the spirit realm and allows an exorcism to occur. This stage is critical as it establishes a channel for dialogue between the human participants and the spirits. An exorcism ritual typically follows a structured process, starting with the opening to set the stage, the invocation for summoning spirits, engaging in dialogue to establish communication, repetition of prayers or acts to reinforce the ritual's purpose, and closing with a blessing to dismiss all participants safely.
This process includes structured steps such as opening, invocation, dialogue, repetition, and closure to ensure a safe and legitimate ritual.