Final answer:
The subject of this question is Social Studies. It pertains to the subculture of Otaku who establish their own networks of information and trade. They rely on conventions and online communities to connect with others and share information about anime, manga, and merchandise.
Step-by-step explanation:
The subject of this question is Social Studies. Social Studies is the study of human society and the various cultures, subcultures, and groups within it. It examines the way individuals interact with each other and with their environment, as well as the social, political, economic, and cultural systems that shape society.
In this case, the question pertains to the subculture of Otaku, which is a term used to describe individuals who have a deep enthusiasm for anime, manga, and Japanese pop culture. Otaku often establish their own networks to share information and trade merchandise, rather than relying on authorized sources of product information and distribution.
An example of Otaku establishing their own networks is through conventions and online communities where they can connect with other like-minded individuals and share information about their favorite anime, manga, and merchandise. These networks provide a space for Otaku to discuss and exchange knowledge, as well as facilitate the trade of collectibles and fan-made creations.