Answer:
Topical organization.
Step-by-step explanation:
As the exercise presents, the pattern chosen to organize is called "topical organization". This is a commonly used format, and works like this: it arranges information according to different sub-topics under a larger one. For example, following the content of the example, a topical organization would look like this:
Modern symphony orchestra:
*Strings
(Information about strings)
*Woodwinds
(information about woodwinds)
And so on with the rest of the instruments.