Final answer:
Forrest will use spatial order as the organizational pattern in his speech comparing the human personality to a house.
Step-by-step explanation:
In his speech, Forrest plans to describe the human personality as a house, comparing each segment of our public and private personality to different rooms in a house. The organizational pattern that Forrest will use is spatial order. By using spatial order, Forrest will organize his speech by moving from room to room, discussing each segment of the human personality in relation to a specific room in a house. This organizational pattern allows for a clear and logical presentation of ideas.