Infotainment is best defined as:

Infotainment is best defined as a blend of factual reporting and entertainment. This term emerges from the combination of information and entertainment, where news content is presented in an engaging and entertaining manner. Infotainment often aims to attract a broader audience by making serious topics more accessible and enjoyable, thereby increasing viewer engagement. This format is prevalent in various media, including television shows, online content, and print.

The other choices do not capture the essence of infotainment. For instance, a type of programming dedicated solely to news does not incorporate entertainment elements, making it distinct from infotainment. A genre of media aimed exclusively at children focuses on a specific demographic without necessarily mixing informative content and entertainment. Lastly, strictly traditional journalism without entertainment lacks the engaging aspects that define infotainment and tends to adhere to more serious reporting standards. Thus, the correct answer effectively encapsulates the core idea behind infotainment.