Answer:
Spatial
Explanation:
There are many pattern of speech organisation like Topical Order, Chronological Order, Spatial Order, Causal Order, Problem-Solution Arrangement and Motivated Sequence Order.
Spatial Order arranges the ideas according to the location or the geography. It provides a way to examine the structures, such as buildings/ objects. Spatial order provides ways to analyze the conditions in relevant locales.
The example given is of the year in which the writer is writing in such a way that first he explains the outer ear , then middle ear and lastly the inner ear. The ideas in the speech are arranged according to the location.